Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-ARCH x86_64

What I was doing when the application crashed:
This happens a lot when starting applications. This just happened when I started Dolphin from a shortcut on my Desktop.

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 0 (LWP 3917)]

Thread 2 (Thread 0x7fa3804ae910 (LWP 3918)):
#0  0x00007fa398250dd9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fa39bef8c1b in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#2  0x00007fa398d10a3c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007fa39bef7b55 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007fa39824c57a in start_thread () from /lib/libpthread.so.0
#5  0x00007fa39ed2614d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fa39f30c7a0 (LWP 3917)):
[KCrash Handler]
#5  0x00007fa381794cf8 in AbstractTaskItem::basicPreferredSize () from /usr/lib/kde4/plasma_applet_tasks.so
#6  0x00007fa3817911e5 in TaskItemLayout::maximumRows () from /usr/lib/kde4/plasma_applet_tasks.so
#7  0x00007fa381799ae7 in TaskGroupItem::optimumCapacity () from /usr/lib/kde4/plasma_applet_tasks.so
#8  0x00007fa38178cd20 in Tasks::adjustGroupingStrategy () from /usr/lib/kde4/plasma_applet_tasks.so
#9  0x00007fa38178cf38 in Tasks::constraintsEvent () from /usr/lib/kde4/plasma_applet_tasks.so
#10 0x00007fa39e8ded2c in Plasma::Applet::flushPendingConstraintsEvents () from /usr/lib/libplasma.so.3
#11 0x00007fa39e8df385 in Plasma::Applet::timerEvent () from /usr/lib/libplasma.so.3
#12 0x00007fa39bfec663 in QObject::event () from /usr/lib/libQtCore.so.4
#13 0x00007fa39cc9cbeb in QGraphicsWidget::event () from /usr/lib/libQtGui.so.4
#14 0x00007fa39c6cd0cc in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#15 0x00007fa39c6d439e in QApplication::notify () from /usr/lib/libQtGui.so.4
#16 0x00007fa39d78a8d6 in KApplication::notify () from /usr/lib/libkdeui.so.5
#17 0x00007fa39bfdd5bc in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#18 0x00007fa39c008bd2 in ?? () from /usr/lib/libQtCore.so.4
#19 0x00007fa39c005b3d in ?? () from /usr/lib/libQtCore.so.4
#20 0x00007fa396841dbe in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#21 0x00007fa396845568 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#22 0x00007fa396845690 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#23 0x00007fa39c005a86 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#24 0x00007fa39c76007e in ?? () from /usr/lib/libQtGui.so.4
#25 0x00007fa39bfdbec2 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#26 0x00007fa39bfdc294 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#27 0x00007fa39bfde449 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#28 0x00007fa39efeb28f in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#29 0x00007fa39ec799ed in __libc_start_main () from /lib/libc.so.6
#30 0x0000000000400629 in _start ()

Reported using DrKonqi