Haven't yet heard from NV Access, but I just reproduced the problem again, and this time I really tried to alt tab and browse Explorer windows a lot, and tabbing among the various elements in the Explorer window to break things a lot. Here is the log contents after NVDA is initialized. It's huge because I tried to do a lot of things. It seems the more you try to do the more it grows. Maybe someone here can look at it and figure out what's going on? I have no clue.

DEBUGWARNING - eventHandler.executeEvent (20:24:07.799):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04D6CFF0> with extra args of {'ch': u'\r'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:08.174):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04D6CFF0> with extra args of {'ch': u'm'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:08.283):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04D6CFF0> with extra args of {'ch': u'y'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:09.033):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04D6CFF0> with extra args of {'ch': u'\r'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:10.062):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04D6CFF0> with extra args of {'ch': u'd'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:10.176):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04D6CFF0> with extra args of {'ch': u'o'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:10.266):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04D6CFF0> with extra args of {'ch': u'w'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:10.361):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04D6CFF0> with extra args of {'ch': u'n'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:17.101):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04DC3510> with extra args of {'ch': u'\r'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:17.986):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04DC3510> with extra args of {'ch': u'm'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:18.112):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04DC3510> with extra args of {'ch': u'y'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:19.454):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04DC3510> with extra args of {'ch': u'\r'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:29.013):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04DC32B0> with extra args of {'ch': u'\r'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:29.582):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04E57DF0> with extra args of {'ch': u'c'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:31.904):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04EA8150> with extra args of {'ch': u'm'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:32.690):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04EA8370> with extra args of {'ch': u'\r'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:32.755):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04EA8370> with extra args of {'ch': u'c'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:32.829):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04EA8370> with extra args of {'ch': u'a'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:32.892):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04EA8370> with extra args of {'ch': u'l'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:33.788):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04EA86D0> with extra args of {'ch': u'\r'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:35.726):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04EA8950> with extra args of {'ch': u'\r'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:36.640):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04EA85F0> with extra args of {'ch': u'\r'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - eventHandler.executeEvent (20:24:39.336):
error executing event: typedCharacter on <NVDAObjects.Dynamic_UIItemListItemUIA object at 0x04EA8AF0> with extra args of {'ch': u'\r'}
Traceback (most recent call last):
  File "eventHandler.pyc", line 143, in executeEvent
  File "eventHandler.pyc", line 91, in __init__
  File "eventHandler.pyc", line 98, in next
  File "NVDAObjects\__init__.pyc", line 897, in event_typedCharacter
  File "speech.pyc", line 654, in speakTypedCharacters
  File "api.pyc", line 238, in isTypingProtected
  File "baseObject.pyc", line 34, in __get__
  File "baseObject.pyc", line 110, in _getPropertyViaCache
  File "NVDAObjects\UIA\__init__.pyc", line 996, in _get_states
  File "NVDAObjects\UIA\__init__.pyc", line 684, in _prefetchUIACacheForPropertyIDs
COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
DEBUGWARNING - NVDAObjects.IAccessible.IAccessible._get_IAccessibleRole (20:24:59.946):
accRole failed: (-2147417848, 'The object invoked has disconnected from its clients.', (None, None, None, 0, None))
DEBUGWARNING - NVDAObjects.IAccessible.IAccessible._get_IAccessibleRole (20:24:59.956):
accRole failed: (-2147417848, 'The object invoked has disconnected from its clients.', (None, None, None, 0, None))

I have seen this issue happen when using Gold Wave, now that people are mentioning it. I usually avoid the problem by doing large batch processing jobs, such as converting many audio files, before going to sleep or otherwise being away from my computer for a long while. It really would be great if the issue could be fixed though. As for the 32 bit vs. 64 bit installer discussion, maybe they won't be so rigid about this now that XP support has been dropped.

I have the same issue when Audacity is doing something and it is a 32 bit program, so it seems that 32 bit vs 64 bit doesn't apply here.

Hi all,
More information!
I received an e-mail from NVAccess.

I haven't looked into the power profile yet, though I do set my power plans to high performance because especially on laptops, using anything but that really makes the system lag in my experience.
Speaking of my laptop, I recently installed Win10 on it (did a fresh install on both my machines a few months ago). The laptop didn't get used much, though, but I did start installing updated versions of things. I unpacked the laptop today and tested my Gold Wave predicament on it, and given that it's a pretty fresh install, I'd expect it to work pretty well. The only things I installed before that were NVDA, Sea Monkey and the old Skype 7, all of which I use regularly so can't afford to not install. Closing all of them doesn't seem to make a difference, though, and the issue occurs on my laptop. This makes three computers now (two of mine, and the friend's laptop I mentioned earlier in this thread) that I've seen Gold Wave do this on.

In addition I've heard from about half a dozen people now, some of which were from this thread and others on Twitter, who say that any time their system is under load that this flares up like my Gold Wave test does. One person told me it happens a lot when deleting/copying files, and come to think of it, that can also throw a major fit on my desktop as well.

Some people have it worse than others though. On my desktop, it is indeed extremely irritating, but it's still only moderate. Part of that might be because it's a powerful machine. Maybe the episodes do in fact have to do with system load. In which case I should check CPU usage more often and see if I can find more of a pattern. The x86 vs x64 thing I theorized about earlier might well be nothing more than x86 apps not being able to make full use of my resources. I have 8 gb of ram and an octacore processor on my desktop, so that would make some sense.

For now, I have a sort of hacky solution to the alt tab issue that a friend on Twitter told me about and was kind enough to give me. I've uploaded it here. From what I'm told it reverts back to the old alt tab switching that doesn't use UIA, but that is just what I've been told. I tested the reg entry, and it does work .Simply run the install alt tab.reg file, kill explorer.exe, restart explorer.exe, and alt tab should never break for you again. If for some reason you don't like the tweak or want to get rid of it, there's an uninstall reg entry. Don't worry, these are not dangerous reg files, I've tested and looked at the files and they seem to do what they are meant to and nothing more. Unfortunately this will not fix file browsing or file open dialogs though, the latter of which is especially annoying as I don't yet know a way to replace the file open dialog that you'd access when doing an open/save operation in most programs. Those dialogs can often stop speaking too because of this stupid issue, though it's only the list in the dialog that seems to not speak, the tree view still speaks fine. At least alt tab is fixed, or rather, forced to use the old style until Microsoft decides to kill it, or more preferably, until NVDA can fix its UIA support or whatever it is that's causing these issues.

I'm in two minds about whether to e-mail NVAccess with the logs I posted in post 77 in this thread and these registry entries. It seems, to me at least, that they aren't aware of this knowledge. I want a dev or someone who assists in development to see it, not someone who just deals with support inquiries. Nothing at all against their support, but I never seem to get anywhere if I contact a support rep on a product. I'm often told to try this and try that because users reported the most success, or I get generic explanations for why things work or don't work. In most cases I would just shrug it off, but now I have clear technical evidence that something is wrong and I have a registry tweak that improves one aspect of the situation. This really seems to be something a support rep, unless he's a developer himself, won't know how to get to the real bottom of. I think I need to submit an issue to git hub, which I have been told to do for quite a while now. The prospect of that is a little intimidating though, since I am really not well-versed in these matters, and have no doubt spread confusing and misleading information because of that. I don't know all the details they would request for reporting an issue like this. I tried reporting an issue to a similar thing once and they asked for things I had no clue how to provide so maybe that is why I'm nervous about it. I guess I'll have to try, though. And let the logs and registry tweaks speak for themselves.

It's nhot that I don't want to send them the log, it's that I don't know what information they need to debug the issue, and that if I don't provide the right information that they may disregard my report.