Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.31-ARCH x86_64

What I was doing when the application crashed:
Plasma recovered from this crash, but some interaction (in this case restarting pidgin) crashes the system tray. BTW restarting pidging because the icon in the system tray was not showing right (Icons not correctlyshowing with some gtk applications likde pidgin, gpodder etc ) .
-Best Regards

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fd7652a6750 (LWP 2043))]

Thread 2 (Thread 0x7fd741dfe910 (LWP 2045)):
#0  0x00007fd764a8edd9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fd764cf9c6b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007fd761179c9c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007fd764cf8ba5 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007fd764a8a57a in start_thread () from /lib/libpthread.so.0
#5  0x00007fd76245514d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fd7652a6750 (LWP 2043)):
[KCrash Handler]
#5  0x000000000060b840 in QListData::shared_null ()
#6  0x00007fd74918427a in TaskItemLayout::layoutItems() () from /usr/lib/kde4/plasma_applet_tasks.so
#7  0x00007fd7491847d7 in TaskItemLayout::remove(AbstractTaskItem*) () from /usr/lib/kde4/plasma_applet_tasks.so
#8  0x00007fd74918487e in TaskItemLayout::removeTaskItem(AbstractTaskItem*) () from /usr/lib/kde4/plasma_applet_tasks.so
#9  0x00007fd749190b06 in TaskGroupItem::itemPositionChanged(TaskManager::AbstractGroupableItem*) () from /usr/lib/kde4/plasma_applet_tasks.so
#10 0x00007fd749190fbc in TaskGroupItem::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_tasks.so
#11 0x00007fd764df2d3c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x00007fd748f55e62 in TaskManager::TaskGroup::itemPositionChanged(TaskManager::AbstractGroupableItem*) () from /usr/lib/libtaskmanager.so.4
#13 0x00007fd748f582e8 in TaskManager::TaskGroup::moveItem(int, int) () from /usr/lib/libtaskmanager.so.4
#14 0x00007fd748f3eead in TaskManager::AbstractSortingStrategy::check(TaskManager::AbstractGroupableItem*) () from /usr/lib/libtaskmanager.so.4
#15 0x00007fd748f3f25e in TaskManager::AbstractSortingStrategy::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libtaskmanager.so.4
#16 0x00007fd764df2d3c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#17 0x00007fd748f402cc in TaskManager::GroupManagerPrivate::addTask(KSharedPtr<TaskManager::Task>) () from /usr/lib/libtaskmanager.so.4
#18 0x00007fd748f421ba in TaskManager::GroupManager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libtaskmanager.so.4
#19 0x00007fd764df2d3c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#20 0x00007fd748f593b2 in TaskManager::TaskManager::taskAdded(KSharedPtr<TaskManager::Task>) () from /usr/lib/libtaskmanager.so.4
#21 0x00007fd748f5b3b0 in TaskManager::TaskManager::windowAdded(unsigned long) () from /usr/lib/libtaskmanager.so.4
#22 0x00007fd748f5c6cf in TaskManager::TaskManager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libtaskmanager.so.4
#23 0x00007fd764df2d3c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#24 0x00007fd7638d89c2 in KWindowSystem::windowAdded(unsigned long) () from /usr/lib/libkdeui.so.5
#25 0x00007fd7638db57a in KWindowSystemPrivate::addClient(unsigned long) () from /usr/lib/libkdeui.so.5
#26 0x00007fd7638e91ad in NETRootInfo::update(unsigned long const*) () from /usr/lib/libkdeui.so.5
#27 0x00007fd7638e9eb1 in NETRootInfo::event(_XEvent*, unsigned long*, int) () from /usr/lib/libkdeui.so.5
#28 0x00007fd7638db9cc in KWindowSystemPrivate::x11Event(_XEvent*) () from /usr/lib/libkdeui.so.5
#29 0x00007fd7637aca56 in KApplication::x11EventFilter(_XEvent*) () from /usr/lib/libkdeui.so.5
#30 0x00007fd758f4e624 in PlasmaApp::x11EventFilter(_XEvent*) () from /usr/lib/libkdeinit4_plasma-desktop.so
#31 0x00007fd762bd4491 in ?? () from /usr/lib/libQtGui.so.4
#32 0x00007fd762be4a79 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#33 0x00007fd762c0d96c in ?? () from /usr/lib/libQtGui.so.4
#34 0x00007fd761adf1fe in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#35 0x00007fd761ae2bb8 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#36 0x00007fd761ae2ce0 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#37 0x00007fd764e06123 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#38 0x00007fd762c0d14e in ?? () from /usr/lib/libQtGui.so.4
#39 0x00007fd764ddc532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#40 0x00007fd764ddc904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#41 0x00007fd764ddeab9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#42 0x00007fd758f3b28f in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#43 0x0000000000406eae in _start ()

Reported using DrKonqi