It seems that I am an magnet for problems :-).
I wanted to test issues that I reported concerning eSpeak and SAPI 4. So
I completely deleted NVDA sources and checked again.
Then I started NVDA and thought that the Capslock is NVDA modifier. It
is not by default.
Right after starting NVDA I pressed Capslock+N and the following error
ERROR - keyboardHandler.internal_keyDownEvent:
Traceback (most recent call last):
File "C:\svn\nvda\trunk\source\keyboardHandler.py", line 140, in
if modifiers is None and lastKeyCount>=1 and
TypeError: unsupported operand type(s) for -: 'float' and 'NoneType'
It happens only once but only when I quickly press Capslock+N, after I
hear "NVDA started" "NVDA spusteny" in Slovak.
It is reproduceable always on my system.