Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2)) "release 142"
Qt Version: 4.5.2
Operating System: Linux 2.6.27.23-0.1-pae i686
Distribution: "openSUSE 11.1 (i586)"

What I was doing when the application crashed:
I played around with the desktop switch effect (using ATI's proprietary driver fglrx).
At one point switching lead to this crash

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb5fd0700 (LWP 10745))]

Thread 2 (Thread 0xa935db90 (LWP 10748)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb7e51c35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7eb1582 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#3  0xb7728ad2 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7eb0572 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7e4e1b5 in start_thread () from /lib/libpthread.so.0
#6  0xb66973be in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5fd0700 (LWP 10745)):
[KCrash Handler]
#6  AbstractTaskItem::basicPreferredSize (this=0x910e318) at /usr/src/debug/kdebase-workspace-4.2.96/plasma/applets/tasks/tasks.h:92
#7  0xa9506501 in TaskItemLayout::preferredColumns (this=0x842b788) at /usr/src/debug/kdebase-workspace-4.2.96/plasma/applets/tasks/taskitemlayout.cpp:206
#8  0xa9506f2d in TaskItemLayout::gridLayoutSize (this=0x842b788) at /usr/src/debug/kdebase-workspace-4.2.96/plasma/applets/tasks/taskitemlayout.cpp:222
#9  0xa9506feb in TaskItemLayout::layoutItems (this=0x842b788) at /usr/src/debug/kdebase-workspace-4.2.96/plasma/applets/tasks/taskitemlayout.cpp:245
#10 0xa9507bd2 in TaskItemLayout::insert (this=0x842b788, index=1, item=0x8b1abe8) at /usr/src/debug/kdebase-workspace-4.2.96/plasma/applets/tasks/taskitemlayout.cpp:125
#11 0xa9507dc7 in TaskItemLayout::addTaskItem (this=0x842b788, item=0x8b1abe8) at /usr/src/debug/kdebase-workspace-4.2.96/plasma/applets/tasks/taskitemlayout.cpp:82
#12 0xa9514b85 in TaskGroupItem::itemAdded (this=0x84213f0, groupableItem=0x841bbb0) at /usr/src/debug/kdebase-workspace-4.2.96/plasma/applets/tasks/taskgroupitem.cpp:477
#13 0xa95151ec in TaskGroupItem::qt_metacall (this=0x84213f0, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbf9eafbc)
    at /usr/src/debug/kdebase-workspace-4.2.96/build/plasma/applets/tasks/taskgroupitem.moc:113
#14 0xb7fba788 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#15 0xb7fbb412 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#16 0xa94d7093 in TaskManager::TaskGroup::itemAdded (this=0x838eb58, _t1=0x841bbb0) at /usr/src/debug/kdebase-workspace-4.2.96/build/libs/taskmanager/taskgroup.moc:139
#17 0xa94d7ce5 in TaskManager::TaskGroup::add (this=0x838eb58, item=0x841bbb0) at /usr/src/debug/kdebase-workspace-4.2.96/libs/taskmanager/taskgroup.cpp:138
#18 0xa94bddba in TaskManager::GroupManagerPrivate::addTask (this=0x842c938, task={d = 0xbf9eb0e4}) at /usr/src/debug/kdebase-workspace-4.2.96/libs/taskmanager/groupmanager.cpp:290
#19 0xa94bec6a in TaskManager::GroupManagerPrivate::actuallyReloadTasks (this=0x842c938) at /usr/src/debug/kdebase-workspace-4.2.96/libs/taskmanager/groupmanager.cpp:155
#20 0xa94c020e in TaskManager::GroupManager::qt_metacall (this=0x8393e18, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbf9eb1b8)
    at /usr/src/debug/kdebase-workspace-4.2.96/build/libs/taskmanager/groupmanager.moc:108
#21 0xb7fba788 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#22 0xb7fbb412 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#23 0xb7ff6fe7 in QTimer::timeout() () from /usr/lib/libQtCore.so.4
#24 0xb7fc0c0e in QTimer::timerEvent(QTimerEvent*) () from /usr/lib/libQtCore.so.4
#25 0xb7fb572f in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#26 0xb696e7fc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#27 0xb6976aee in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#28 0xb746219d in KApplication::notify (this=0x80b1c88, receiver=0x842c978, event=0xbf9eb660) at /usr/src/debug/kdelibs-4.2.96/kdeui/kernel/kapplication.cpp:302
#29 0xb7fa516b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#30 0xb7fd45f6 in ?? () from /usr/lib/libQtCore.so.4
#31 0xb7fd0980 in ?? () from /usr/lib/libQtCore.so.4
#32 0xb65149c8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#33 0xb6518083 in ?? () from /usr/lib/libglib-2.0.so.0
#34 0xb6518241 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#35 0xb7fd08d8 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0xb6a0ecc5 in ?? () from /usr/lib/libQtGui.so.4
#37 0xb7fa378a in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#38 0xb7fa3bd2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#39 0xb7fa6079 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#40 0xb696e677 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#41 0xb4ace9f0 in kdemain (argc=1, argv=0x8099f58) at /usr/src/debug/kdebase-workspace-4.2.96/plasma/shells/desktop/main.cpp:50
#42 0x0804e36d in launch (argc=1, _name=0x805bbb4 "/usr/bin/plasma-desktop", args=0x805bbcc "", cwd=0x0, envc=0, envs=0x805bbd0 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x8051449 "0") at /usr/src/debug/kdelibs-4.2.96/kinit/kinit.cpp:676
#43 0x0804eb4d in handle_launcher_request (sock=7, who=<value optimized out>) at /usr/src/debug/kdelibs-4.2.96/kinit/kinit.cpp:1168
#44 0x0804efe3 in handle_requests (waitForPid=0) at /usr/src/debug/kdelibs-4.2.96/kinit/kinit.cpp:1361
#45 0x0804fc8a in main (argc=2, argv=0xbf9ec094, envp=0xbf9ec0a0) at /usr/src/debug/kdelibs-4.2.96/kinit/kinit.cpp:1788

This bug may be a duplicate of or related to bug 182802

Reported using DrKonqi