Game and Cube Confliction

[milkcow500]

Ubuntu 8.04 with Compliz Fusion: When I am playing a game and I switch to another screen using the cube, and then switch back to the screen where I am playing the game, the game disappears. I can still hear the volume from the game, but it does not show up on the screen. Am I doing something wrong and is there any way to fix this? Thanks.