wine users - Sep 2008 - Unreal Tournament - variable speeds during gameplay

Unreal Tournament works great in 1.1.4, but with one 'little' problem -
the speed of game (not fps, just speed of gameplay) is changing chaotically
during gameplay - for example it speeds up whe looking on the floor - strange,
isnt it??
 
Ofc I do own dual core processor, but commands taskset 0x01 and  -cpuspeed dont
work.

I dont understand, the Native UT goes ultra fast (and with graphic issues) when
windows version goes without problems, but with this one - what im supposed to
do??