strange mouse behavior

[lucid]

I've had this problem with erratic mouse movement for a few months now. Mouse works absolutely fine in other X programs. The latest 1.0.2553 patch did not help and the same now happens in Black Plague demo so I guess more info is needed. The behaviour is exactly as described in the opening post: mouse cursor gets thrown in the bottom right corner and only by moving very slowly I can get to the exit button on the menu, but even then the cursor randomly moves into opposite direction, towards the corner. It is actually quite difficult to imagine what is happening there.

It seemed that either updated SDL packages or new Xorg introduced the problem in the first place, but it isn't certain. I'm running Overture on Debian.

Some details: GeForce 8400 GS (GF6600 tried as well) with nvidial-glx 169.09, SDL 1.2.13, Xorg 7.3 at 1920x1200 with mouse in use via the evdev driver.