Igor Stasenko wrote:
> It does not fixes the problem for me :(
> I wonder, why mouse scroll behavior depends on flaps or locale..

Most likely because scroll events are delivered as Ctrl-UpArrow and 
Ctrl-DownArrow events and there is a chance that the input converters 
muck with that. I had a quick look but I couldn't find much. Some things 
you could try is:
* see if typing Ctrl-UpArrow and Ctrl-DownArrow scrolls text
* check what running "Sensor kbdTest" shows when you operate the scroll 
wheel
* check the keyboard converter in World primaryHand to ensure it's correct.

Cheers,
   - Andreas