I tried to apply special settings to a window (just ticking Full Window and Desktop one, both on initialization), KDE freezes. Only thing that works is Crtl-Alt-Backspace.
It happened after upgrading to 4.5.1 and rebooting, but I hadn't tried it before. so I'm not sure if it's a new issue.
Kernel 220.127.116.11-bfs and Intel onboard graphics.