ATM I'm running Gnome 2.20.1, but I've had the same prob with KDE 3.x XFCE 4.x etc.
It's got me baffled, other than that one niggle it runs great - it's just an irritating faff having to place the camera back whenever I try to move it.
I've tried it in 'failsafe' and the same happens there. Same with full screen and windowed mode. I've had the it happen on various distros, and I even went as far as removing my Copperhead and trying another mouse.
Guess I'll just have to practise swinging the camera back quicker!
Anyhoo, I've attached a snap of where the camera jumps to. Enjoy!