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: 4.5.2
Operating System: Linux 2.6.30-ARCH i686

What I was doing when the application crashed:
A file copy operation (as root) had just completed, and the window waas closing as plasma crashed. Plasma panel autohidden, using bespin style.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 2435)]

Thread 2 (Thread 0xa6ab8b70 (LWP 2459)):
#0  0xb7f0d424 in __kernel_vsyscall ()
#1  0xb7ca9c55 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7d07047 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb64c8af2 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7d06032 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7ca56bc in start_thread () from /lib/libpthread.so.0
#6  0xb6746ffe in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5d39710 (LWP 2435)):
[KCrash Handler]
#6  0xa90372da in TaskManager::GroupManager::manualSortingRequest () from /usr/lib/libtaskmanager.so.4
#7  0xa9035394 in TaskManager::AbstractGroupingStrategy::closeGroup () from /usr/lib/libtaskmanager.so.4
#8  0xa903cb9d in TaskManager::ProgramGroupingStrategy::checkGroup () from /usr/lib/libtaskmanager.so.4
#9  0xa903d841 in TaskManager::ProgramGroupingStrategy::qt_metacall () from /usr/lib/libtaskmanager.so.4
#10 0xb7e0a91c in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb7e0b552 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#12 0xa9050443 in TaskManager::TaskGroup::itemRemoved () from /usr/lib/libtaskmanager.so.4
#13 0xa9050c6b in TaskManager::TaskGroup::remove () from /usr/lib/libtaskmanager.so.4
#14 0xa9037e05 in TaskManager::GroupManagerPrivate::removeTask () from /usr/lib/libtaskmanager.so.4
#15 0xa903a3ab in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#16 0xb7e0a91c in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#17 0xb7e0b552 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#18 0xa9053e03 in TaskManager::TaskManager::taskRemoved () from /usr/lib/libtaskmanager.so.4
#19 0xa9055b33 in TaskManager::TaskManager::windowRemoved () from /usr/lib/libtaskmanager.so.4
#20 0xa905748f in TaskManager::TaskManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#21 0xb7e0a91c in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#22 0xb7e0b552 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#23 0xb7561f63 in KWindowSystem::windowRemoved () from /usr/lib/libkdeui.so.5
#24 0xb7565206 in KWindowSystemPrivate::removeClient () from /usr/lib/libkdeui.so.5
#25 0xb7573c85 in NETRootInfo::update () from /usr/lib/libkdeui.so.5
#26 0xb7573f82 in NETRootInfo::event () from /usr/lib/libkdeui.so.5
#27 0xb75654a1 in KWindowSystemPrivate::x11Event () from /usr/lib/libkdeui.so.5
#28 0xb7412dd6 in KApplication::x11EventFilter () from /usr/lib/libkdeui.so.5
#29 0xb481204f in PlasmaApp::x11EventFilter () from /usr/lib/libkdeinit4_plasma-desktop.so
#30 0xb6a33d90 in ?? () from /usr/lib/libQtGui.so.4
#31 0xb6a44f75 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#32 0xb6a70e42 in ?? () from /usr/lib/libQtGui.so.4
#33 0xb65dad98 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#34 0xb65de3e0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#35 0xb65de513 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#36 0xb7e1f5dc in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#37 0xb6a70575 in ?? () from /usr/lib/libQtGui.so.4
#38 0xb7df34e9 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#39 0xb7df393a in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#40 0xb7df5daf in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#41 0xb69d25b7 in QApplication::exec () from /usr/lib/libQtGui.so.4
#42 0xb47fba4d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#43 0x0804ddad in _start ()

Reported using DrKonqi