Version: (using KDE 4.0.4) Installed from: Fedora RPMs In the bottom navigation (is that "kicker"?) sometimes when I try to switch between tasks/programs, trying to minimize them etc. the "bubble" showing the current program-details hangs, no more task-switches are possible ... not even with Alt-Tab. Current program still runs (e.g. a firefox - animations running via javascript or so), but it's not possible to change e.g. the tabs in firefox.
Fixed in 4.1 and this is also a kwin bug