Input Lag with high FPS - Torque 3d

Hi all,

as subject says, I'm getting severe mouselag in torque 3d both in the map editor, and the "full" new project. No mouse lag on menu screen (at around 650 fps) and quite bad, 1/2 second mouse lag, at around 75 fps, on the empty terrain level.

Hardware is:

single x1950 crossfire edition
2gigs ram
E6750 processor
Edit: OS is xp home 32bit
Things I've tried:

I've set my cards "flip queue size" to 0 (and tryed at 1 as well)
$pref::Video::killFramesAhead is set to 1 in prefs.cs

Any ideas?


Edit: on a side note, does torque enforce mouse acceleration? I have "enhance pointer precision" disabled in the control panel, but it still feels as though there is acceleration in game, though it is difficult to tell with the mouse lag and all.