I'm told this trace is not useful. Happened when I tried to start smooth-tasks plasma Application: plasma-desktop (0.3) KDE Platform Version: 4.4.00 (KDE 4.4.0) Qt Version: 4.6.1 Operating System: Linux 2.6.31.12-174.2.3.fc12.x86_64 x86_64 Distribution: "Fedora release 12 (Constantine)" -- Information about the crash: <In detail, tell us what you were doing when the application crashed.> -- Backtrace: Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault 82 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) [KCrash Handler] #5 0x00007f3d5e154934 in QGraphicsLayoutItem::setParentLayoutItem(QGraphicsLayoutItem*) () from /usr/lib64/libQtGui.so.4 #6 0x00007f3d3590e3e7 in ?? () from /usr/lib64/kde4/plasma_applet_smooth- tasks.so #7 0x00007f3d3590f388 in ?? () from /usr/lib64/kde4/plasma_applet_smooth- tasks.so #8 0x00007f3d358f047f in ?? () from /usr/lib64/kde4/plasma_applet_smooth- tasks.so #9 0x00007f3d358f0549 in ?? () from /usr/lib64/kde4/plasma_applet_smooth- tasks.so #10 0x00007f3d5d495a55 in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4 #11 0x00007f3d5e191f7b in QGraphicsWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4 #12 0x00007f3d5dbaf86c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4 #13 0x00007f3d5dbb593b in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4 #14 0x00007f3d5f12c7a6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5 #15 0x00007f3d5d48696c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4 #16 0x00007f3d5d4876b7 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQtCore.so.4 #17 0x00007f3d5d4ac773 in ?? () from /usr/lib64/libQtCore.so.4 #18 0x0000003125c3920e in g_main_dispatch (context=0xc74520) at gmain.c:1960 #19 IA__g_main_context_dispatch (context=0xc74520) at gmain.c:2513 #20 0x0000003125c3cbf8 in g_main_context_iterate (context=0xc74520, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:2591 #21 0x0000003125c3cd1a in IA__g_main_context_iteration (context=0xc74520, may_block=1) at gmain.c:2654 #22 0x00007f3d5d4ac2b3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4 #23 0x00007f3d5dc4e36e in ?? () from /usr/lib64/libQtGui.so.4 #24 0x00007f3d5d4853b2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4 #25 0x00007f3d5d48567c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4 #26 0x00007f3d5d487969 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4 #27 0x00007f3d61612e52 in kdemain () from /usr/lib64/libkdeinit4_plasma- desktop.so #28 0x0000003fdc61eb1d in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=<value optimized out>) at libc-start.c:226 #29 0x00000000004007c9 in _start () Report to https://bugs.kde.org