I have experienced it too, plasma crashed with SIGSEGV. it seems to be related to amarok.
Description: Ubuntu jaunty (development branch) Release: 9.04 <unknown program name>(14921)/ checkComposite: Plasma has an argb visual 0x8ef2a08 85983233 <unknown program name>(14921)/ checkComposite: Plasma is COMPOSITE-less on 0x8ee9060 Qt: 4.5.0-rc1 KDE: 4.2.00 (KDE 4.2.0) Plasma Workspace: 0.3 -- plasma crashed with SIGSEGV in Plasma::Applet::focusInEvent() https://bugs.launchpad.net/bugs/336202 You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kdebase-workspace in ubuntu. -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs