[Wine] fullscreen uses panning, and xrandr has cursor moving

I'm having a problem with games running in wine fullscreen with nvidia 
proprietary driver 185.18 under Fedora 11 64-bit.

My desktop resolution is 1920x1200, and when I run a game with 1280x960 
fullscreen setup (like Halo for example), it changes resolution to 1280x960 and 
runs fullscreen as expected, but when I move the mouse toward the edge rapidly, 
it pans the game screen away as if 1280x960 screen is moving around the larger 
1920x1200 desktop, with the 1280x960 game display at the lower right corner of 
the larger desktop.

If I run xrandr manually before launching the game, e.g.,

xrandr --output default --mode 1280x960

then panning no longer occurs, so the game display stays on the screen, but now 
a different problem occurs: The mouse cursor moves slowly toward upper left 
corner by itself, as if adjusting to a scaled coordinate (maybe scaling 
1920x1200 to 1280x960? I don't know.) I can move it around, but it still slowly 
heads toward the upper left corner. Obviously I can't control the game movement 
that requires the mouse, as it slowly moves the 1st person view toward the sky 
for example.

How do I solve this problem?

Setting DXGrab on or off has no effect.