Comment 10 for bug 279654

I am affected by this bug. I'm using jaunty with firefox 3.0.5 on intel gm4500 video, and just now I triggered the bug (again), and the system hung for a while, then when it got 'unstuck', I saw a notification flash quickly from kwin that 'compositing was slow', and now while my desktop effects appear disabled (by function only, the 'settings' program still shows them as active), I can't trigger the bug anymore... So I'd agree that it looks like a bug in compositing support in kwin.