Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-ARCH i686

What I was doing when the application crashed:
I saved a PDF-document from GMail in Firefox, and when minimizing Firefox plasma crashed. I did nothing fancy and have no plasma applets except a folder view.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 2044)]

Thread 2 (Thread 0xa9357b70 (LWP 2045)):
#0  0xb80dd424 in __kernel_vsyscall ()
#1  0xb7e76bc5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7ed5047 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb6747c12 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7ed4032 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7e7268c in start_thread () from /lib/libpthread.so.0
#6  0xb69c4e2e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5fc9710 (LWP 2044)):
[KCrash Handler]
#6  0xa95302bc in AbstractTaskItem::basicPreferredSize () from /usr/lib/kde4/plasma_applet_tasks.so
#7  0xa952c369 in TaskItemLayout::maximumRows () from /usr/lib/kde4/plasma_applet_tasks.so
#8  0xa9535fb4 in TaskGroupItem::optimumCapacity () from /usr/lib/kde4/plasma_applet_tasks.so
#9  0xa95272d8 in Tasks::adjustGroupingStrategy () from /usr/lib/kde4/plasma_applet_tasks.so
#10 0xa952756c in Tasks::constraintsEvent () from /usr/lib/kde4/plasma_applet_tasks.so
#11 0xb5cd9b93 in Plasma::Applet::flushPendingConstraintsEvents () from /usr/lib/libplasma.so.3
#12 0xb5cda2c8 in Plasma::Applet::timerEvent () from /usr/lib/libplasma.so.3
#13 0xb7fd2b3f in QObject::event () from /usr/lib/libQtCore.so.4
#14 0xb729ce64 in QGraphicsWidget::event () from /usr/lib/libQtGui.so.4
#15 0xb6c4f6c4 in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#16 0xb6c56dac in QApplication::notify () from /usr/lib/libQtGui.so.4
#17 0xb7691faa in KApplication::notify () from /usr/lib/libkdeui.so.5
#18 0xb7fc2fab in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#19 0xb7ff077e in ?? () from /usr/lib/libQtCore.so.4
#20 0xb7fed760 in ?? () from /usr/lib/libQtCore.so.4
#21 0xb6859d98 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#22 0xb685d3e0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#23 0xb685d513 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#24 0xb7fed6ac in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#25 0xb6ced355 in ?? () from /usr/lib/libQtGui.so.4
#26 0xb7fc1559 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#27 0xb7fc19aa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#28 0xb7fc3e1f in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#29 0xb6c4f547 in QApplication::exec () from /usr/lib/libQtGui.so.4
#30 0xb4a6c5ad in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#31 0x0804de22 in _start ()

This bug may be a duplicate of or related to bug 203129

Reported using DrKonqi