Comment 6 for bug 175744

I can confirm this bug too. Trying to switch to a window by clicking on it in the window list plugin causes the display to freeze (not always, but often enough that I'm now wary of using the window list to switch and use Alt-Tab exclusively). The mouse moves, but the X display is frozen and unresponsive otherwise. The other instance when the system hangs like this is at times when I click on a visible window title bar to select and bring it to the foreground. This seems to happen more often if that window is a fullscreen window.
After a freeze, I have to use the Alt-SysRq+K to kill the X server, and after I login back again, running top shows a compiz.real process hogging all the CPU time, and I have to kill it.
I don't see any message added to syslog when a freeze occurs. I have an Intel 945GM graphics chipset.