Comment 9 for bug 145262

Binary package hint: unclutter

When playing games fullscreen with unclutter running, unclutter considers the pointer to be inactive and will try to grab the pointer (and hide it). This causes the mouse/crosshair in the game to jump to the center of the screen some seconds after moving it (whatever the unclutter -delay is set to).

Solution would be to either fix unclutter or to kill it when switching to fullscreen.