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 x86_64

What I was doing when the application crashed:
Plasma Workspace crashed when I attempted to reply to a message in Kmail.  The only other application open was Opera.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 1899)]

Thread 3 (Thread 0x7fa484fd6910 (LWP 1900)):
#0  0x00007fa4a49ffdd9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fa4a4c6f34b in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#2  0x00007fa4a10df3fc in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007fa4a4c6e285 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007fa4a49fb57a in start_thread () from /lib/libpthread.so.0
#5  0x00007fa4a23bb14d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fa47feb9910 (LWP 1904)):
#0  0x00007fa4a4a0005d in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fa4a4c6dd25 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007fa4a4c6de80 in QThread::msleep () from /usr/lib/libQtCore.so.4
#3  0x00007fa486ec8fbf in Update_Thread::run () from /usr/lib/kde4/plasma_applet_cwp.so
#4  0x00007fa4a4c6e285 in ?? () from /usr/lib/libQtCore.so.4
#5  0x00007fa4a49fb57a in start_thread () from /lib/libpthread.so.0
#6  0x00007fa4a23bb14d in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fa4a521e750 (LWP 1899)):
[KCrash Handler]
#5  0x00007fa4888bd797 in TaskManager::TaskItem::task () from /usr/lib/libtaskmanager.so.4
#6  0x00007fa488af042d in STasksTask::task () from /usr/lib/kde4/plasma_applet_stasks.so
#7  0x00007fa488aee12e in STasksItem::updateState () from /usr/lib/kde4/plasma_applet_stasks.so
#8  0x00007fa488aee641 in STasksItem::STasksItem () from /usr/lib/kde4/plasma_applet_stasks.so
#9  0x00007fa488ae6117 in STasksApplet::itemAdded () from /usr/lib/kde4/plasma_applet_stasks.so
#10 0x00007fa488ae85e8 in STasksApplet::qt_metacall () from /usr/lib/kde4/plasma_applet_stasks.so
#11 0x00007fa4a4d68dec in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#12 0x00007fa4888bb28f in TaskManager::TaskGroup::itemAdded () from /usr/lib/libtaskmanager.so.4
#13 0x00007fa4888bbb7b in TaskManager::TaskGroup::add () from /usr/lib/libtaskmanager.so.4
#14 0x00007fa4888a21d0 in TaskManager::AbstractGroupingStrategy::createGroup () from /usr/lib/libtaskmanager.so.4
#15 0x00007fa4888aab1d in TaskManager::ProgramGroupingStrategy::programGrouping () from /usr/lib/libtaskmanager.so.4
#16 0x00007fa4888ab09b in TaskManager::ProgramGroupingStrategy::handleItem () from /usr/lib/libtaskmanager.so.4
#17 0x00007fa4888a4f7a in TaskManager::GroupManagerPrivate::addTask () from /usr/lib/libtaskmanager.so.4
#18 0x00007fa4888a70ba in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#19 0x00007fa4a4d68dec in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#20 0x00007fa4888be702 in TaskManager::TaskManager::taskAdded () from /usr/lib/libtaskmanager.so.4
#21 0x00007fa4888c0700 in TaskManager::TaskManager::windowAdded () from /usr/lib/libtaskmanager.so.4
#22 0x00007fa4888c1a1f in TaskManager::TaskManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#23 0x00007fa4a4d68dec in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#24 0x00007fa4a38508d2 in KWindowSystem::windowAdded () from /usr/lib/libkdeui.so.5
#25 0x00007fa4a385348a in KWindowSystemPrivate::addClient () from /usr/lib/libkdeui.so.5
#26 0x00007fa4a38610bd in NETRootInfo::update () from /usr/lib/libkdeui.so.5
#27 0x00007fa4a3861dc1 in NETRootInfo::event () from /usr/lib/libkdeui.so.5
#28 0x00007fa4a38538dc in KWindowSystemPrivate::x11Event () from /usr/lib/libkdeui.so.5
#29 0x00007fa4a37244f6 in KApplication::x11EventFilter () from /usr/lib/libkdeui.so.5
#30 0x00007fa499834404 in PlasmaApp::x11EventFilter () from /usr/lib/libkdeinit4_plasma-desktop.so
#31 0x00007fa4a2b4ba11 in ?? () from /usr/lib/libQtGui.so.4
#32 0x00007fa4a2b5bff9 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#33 0x00007fa4a2b84e3c in ?? () from /usr/lib/libQtGui.so.4
#34 0x00007fa4a1a45dbe in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#35 0x00007fa4a1a49568 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#36 0x00007fa4a1a49690 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#37 0x00007fa4a4d7c1b6 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#38 0x00007fa4a2b8461e in ?? () from /usr/lib/libQtGui.so.4
#39 0x00007fa4a4d525f2 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#40 0x00007fa4a4d529c4 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#41 0x00007fa4a4d54b79 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#42 0x00007fa4998207bf in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#43 0x0000000000406eae in _start ()

Reported using DrKonqi