Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.95 (KDE 4.2.95 (KDE 4.3 RC1))
Qt Version: 4.5.1
Operating System: Linux 2.6.30-ARCH x86_64

What I was doing when the application crashed:
Plasma Desktop Crashed when I closed the second of two firefox windows on the desktop. Absolutely nothing more than that was going on. This is on kde 4.3 Beta 2 (4.2.95-1) on Archlinux.

Firefox, kwrite, and konqueror were all that were open on the desktop. The box has 4G of good RAM, so resources are not the issue.

Let me know if you need more info on this one. Thanks.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 2469)]

Thread 2 (Thread 0x7f4b3895b910 (LWP 2472)):
#0  0x00007f4b59e7ee99 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f4b5a0ef6fb in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#2  0x00007f4b56527a3c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007f4b5a0ee651 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f4b59e7a59a in start_thread () from /lib/libpthread.so.0
#5  0x00007f4b57805c3d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4b5a69c760 (LWP 2469)):
[KCrash Handler]
#5  0x00007f4b3a97b396 in TaskManager::GroupManager::manualSortingRequest () from /usr/lib/libtaskmanager.so.4
#6  0x00007f4b3a9797d7 in TaskManager::AbstractGroupingStrategy::closeGroup () from /usr/lib/libtaskmanager.so.4
#7  0x00007f4b3a98069b in TaskManager::ProgramGroupingStrategy::checkGroup () from /usr/lib/libtaskmanager.so.4
#8  0x00007f4b3a9812a5 in TaskManager::ProgramGroupingStrategy::qt_metacall () from /usr/lib/libtaskmanager.so.4
#9  0x00007f4b5a1ebf42 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#10 0x00007f4b3a991e72 in TaskManager::TaskGroup::itemRemoved () from /usr/lib/libtaskmanager.so.4
#11 0x00007f4b3a992541 in TaskManager::TaskGroup::remove () from /usr/lib/libtaskmanager.so.4
#12 0x00007f4b3a97bda8 in TaskManager::GroupManagerPrivate::removeTask () from /usr/lib/libtaskmanager.so.4
#13 0x00007f4b3a97e18a in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#14 0x00007f4b5a1ebf42 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0x00007f4b3a9952a5 in TaskManager::TaskManager::taskRemoved () from /usr/lib/libtaskmanager.so.4
#16 0x00007f4b3a996e48 in TaskManager::TaskManager::windowRemoved () from /usr/lib/libtaskmanager.so.4
#17 0x00007f4b3a9985d7 in TaskManager::TaskManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#18 0x00007f4b5a1ebf42 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#19 0x00007f4b58cd23d2 in KWindowSystem::windowRemoved () from /usr/lib/libkdeui.so.5
#20 0x00007f4b58cd516a in KWindowSystemPrivate::removeClient () from /usr/lib/libkdeui.so.5
#21 0x00007f4b58ce32fd in NETRootInfo::update () from /usr/lib/libkdeui.so.5
#22 0x00007f4b58ce3681 in NETRootInfo::event () from /usr/lib/libkdeui.so.5
#23 0x00007f4b58cd541c in KWindowSystemPrivate::x11Event () from /usr/lib/libkdeui.so.5
#24 0x00007f4b58ba61a6 in KApplication::x11EventFilter () from /usr/lib/libkdeui.so.5
#25 0x00007f4b4e9991b4 in PlasmaApp::x11EventFilter () from /usr/lib/libkdeinit4_plasma-desktop.so
#26 0x00007f4b57f96fa1 in ?? () from /usr/lib/libQtGui.so.4
#27 0x00007f4b57fa7889 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#28 0x00007f4b57fd0b84 in ?? () from /usr/lib/libQtGui.so.4
#29 0x00007f4b56e8edee in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#30 0x00007f4b56e924b8 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#31 0x00007f4b56e925e0 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#32 0x00007f4b5a1ff836 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#33 0x00007f4b57fd035e in ?? () from /usr/lib/libQtGui.so.4
#34 0x00007f4b5a1d4ea2 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#35 0x00007f4b5a1d5274 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#36 0x00007f4b5a1d7369 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#37 0x00007f4b4e985fdf in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#38 0x0000000000406e0e in _start ()

Reported using DrKonqi