Hey, I just tried playing the game for the first time and for some reason the game speeds up to twice its supposed speed.

My specs are:
Windows XP
HP pavilion 9000
1,6 GHZ AMD Turion64 x2
Nvidia 7600Go
1 GB Ram

Does anyone hold a solution to that problem? I already tried assigning the game to only one core btw.

The problem is still existing. I do use nGlide by now but now I am stuck with two options:
Either I activate Vsync and get slowdowns or I deactivate it and the game runs at 2-3 times its supposed speed.
Any ideas anyone?

I'll just join the line. Might have something to do with intels speedstep technology, or whatever it's called?

Did you guys fix it? Sometimes framerates are directly proportional to game engine's physics which means if the game runs faster (FPS) so does the physics (gameplay). What I would do is turn on VSync either in the game or forcing via third party application like the famous RivaTuner's D3DOverrider which also can force triple buffering (great to reduce the performance cut, minimal added input lag).

Also, since you both seem to have this issue vertex should write down his computer specs as their may be some correlation if you two have similar hardware setups.

I would also try different drivers specifically the one that was released just when the GPU was released, somewhere in the middle that was rated as "most stable" for your specific GPU and the latest, even beta, to see if it's a driver issue.

You could also try, if you have it, another Unreal Tournament game that uses the same engine and compare and see if you notice the same issue.