hi, my kde 4.5.1 blocks the taskbar and the plasmanoids on desk, sometimes (mostly) and waits several seconds (>15) until it going on, while normal windows and taskswitches or desktop-switch working normal anymore. but that blocks anything on desktop work. other users of that version told me, they do not have that prob. what could be the reason ? btw: no high-cpu-usage programs in background. kind regards, ralf