Wine issue - running behind everything and I can't activate it again

I have an issue when running some games in Wine, like Medal of Honor Pacific Assault. I've gotten the game (and others) to start up in full screen. But when I press something else on the desktop, or the alt-key which makes the unity dash-menu appear, I can't switch back to the game. It keeps running behind everything, but doesn't react to mouse clicks or anything.

I'm on Ubuntu 12.10.

Moved to Wine section.