Running well @1680*1050 windowed, but flashes and switch to desktop when i shift+f4. Process is not killed, but it still flashes and switch to desktop if I try to activate it. Installed latest ATI drivers for Vista/Win7. Worked fine in WinXP.
If I try to change resolution, it goes the fullscreen-switch-mode... Starts in windowed mode when I restart LFS.

Anyone who knows what to do?

quit skype and try again

Strange problem. I can switch without a problem to full-screen, and back with Windows 7 and Skype on or off.

low video memory? tried with lower resolution / lowres textures?
tried to run lfs as admin?
what win7 build? RC 7100 is a bit buggy in my experience.

Looks like all it took was a restart >_<
Works with skype too.

Lol i got this problem now, it has something to do with skype?