Originally Posted by kriko
It's already been reported about a million times, spanning several years, e.g. this 60-page thread
The stutter-free workaround is DirectX-only
Apparently a problem around dynamic lighting, with nvidia's drivers (ATI cards don't have this problem, apparently).
Care to install Windows' UT2004 inside WINE
running on Linux, and try with that DirectX setting UseHardwareTL=False