Hi everyone, I'm using Opensuse 11.2, KDE. new to linux

today I was playing a game called "BZFlag", it's a full screen game, and I saw someone sent me an message on skype and I pressed "alt+tab" trying to get out from the game... but nothing happens, i was still in game, and i couldn't quit the game, the game wasn't catching my keyboard input at all...

could someone suggest what's the correct way to switch out from full screen application?

Thanks a lot!