Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1) "release 6"
Qt Version: 4.5.3
Operating System: Linux 2.6.31.8-0.1-desktop x86_64
Distribution: "openSUSE 11.2 (x86_64)"

What I was doing when the application crashed:
When opening konqueror the plasma desktop crashes and needs to be restarted. Happens randomly not all the time.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f31d5f35750 (LWP 5719))]

Thread 2 (Thread 0x7f31b6a02910 (LWP 5722)):
#0  0x00007f31d5700049 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f31d597053b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/libQtCore.so.4
#2  0x00007f31d1e499ec in ?? () from /usr/lib64/libQtNetwork.so.4
#3  0x00007f31d596f485 in ?? () from /usr/lib64/libQtCore.so.4
#4  0x00007f31d56fb65d in start_thread () from /lib64/libpthread.so.0
#5  0x00007f31d310f14d in clone () from /lib64/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f31d5f35750 (LWP 5719)):
[KCrash Handler]
#5  0x00007f31d3df5f27 in QGraphicsLayoutItem::geometry() const () from /usr/lib64/libQtGui.so.4
#6  0x00007f31d3df9745 in QGraphicsWidget::size() const () from /usr/lib64/libQtGui.so.4
#7  0x00007f31b89edf88 in AbstractTaskItem::basicPreferredSize (this=0x259bcc0) at /usr/src/debug/kdebase-workspace-4.3.1/plasma/applets/tasks/abstracttaskitem.cpp:105
#8  0x00007f31b89ea385 in TaskItemLayout::maximumRows (this=0xdcc680) at /usr/src/debug/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:185
#9  0x00007f31b89f2c77 in TaskGroupItem::optimumCapacity (this=0xdd19b0) at /usr/src/debug/kdebase-workspace-4.3.1/plasma/applets/tasks/taskgroupitem.cpp:1224
#10 0x00007f31b89e5eb0 in Tasks::adjustGroupingStrategy (this=0xb37970) at /usr/src/debug/kdebase-workspace-4.3.1/plasma/applets/tasks/tasks.cpp:245
#11 0x00007f31b89e60c8 in Tasks::constraintsEvent (this=0xb37970, constraints=) at /usr/src/debug/kdebase-workspace-4.3.1/plasma/applets/tasks/tasks.cpp:169
#12 0x00007f31cd66811c in Plasma::Applet::flushPendingConstraintsEvents() () from /usr/lib64/libplasma.so.3
#13 0x00007f31cd668775 in Plasma::Applet::timerEvent(QTimerEvent*) () from /usr/lib64/libplasma.so.3
#14 0x00007f31d5a63f63 in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#15 0x00007f31d3dfa73b in QGraphicsWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#16 0x00007f31d38452ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#17 0x00007f31d384c57e in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#18 0x00007f31d443f8d6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#19 0x00007f31d5a54ddc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#20 0x00007f31d5a8071d in ?? () from /usr/lib64/libQtCore.so.4
#21 0x00007f31d5a7d678 in ?? () from /usr/lib64/libQtCore.so.4
#22 0x00007f31d278edde in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#23 0x00007f31d27927a8 in ?? () from /usr/lib64/libglib-2.0.so.0
#24 0x00007f31d27928d0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#25 0x00007f31d5a7d3a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#26 0x00007f31d38d831e in ?? () from /usr/lib64/libQtGui.so.4
#27 0x00007f31d5a53712 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#28 0x00007f31d5a53ae4 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#29 0x00007f31d5a55c99 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#30 0x00007f31c9ff8d6f in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.3.1/plasma/shells/desktop/main.cpp:50
#31 0x0000000000406f88 in _start ()

Reported using DrKonqi