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 desktop app crash (SIGSEGV) when closing 2 identical Kopete notifications about being unable to connect to the Internet. KWin compositing enabled.

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f2f11acd7a0 (LWP 11958))]

Thread 2 (Thread 0x7f2ef3504910 (LWP 11959)):
#0  0x00007f2f0a9f2dd9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f2f0e6b9c6b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007f2f0b4b2c9c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007f2f0e6b8ba5 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f2f0a9ee57a in start_thread () from /lib/libpthread.so.0
#5  0x00007f2f114e814d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f2f11acd7a0 (LWP 11958)):
[KCrash Handler]
#5  0x00007f2f110da944 in Plasma::ExtenderItem::group() const () from /usr/lib/libplasma.so.3
#6  0x00007f2f110d9158 in Plasma::ExtenderGroup::items() const () from /usr/lib/libplasma.so.3
#7  0x00007f2ef45941e3 in SystemTray::ExtenderTaskBusyWidget::updateTask() () from /usr/lib/kde4/plasma_applet_systemtray.so
#8  0x00007f2ef4594bd0 in SystemTray::ExtenderTaskBusyWidget::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_systemtray.so
#9  0x00007f2f0e7b2d3c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#10 0x00007f2ef4595312 in SystemTray::Manager::notificationRemoved(SystemTray::Notification*) () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x00007f2ef4596584 in SystemTray::Manager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0x00007f2f0e7b2d3c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#13 0x00007f2ef45974d7 in SystemTray::Notification::destroyed(SystemTray::Notification*) () from /usr/lib/kde4/plasma_applet_systemtray.so
#14 0x00007f2ef45979ab in SystemTray::Notification::~Notification() () from /usr/lib/kde4/plasma_applet_systemtray.so
#15 0x00007f2ef45a51da in SystemTray::DBusNotification::~DBusNotification() () from /usr/lib/kde4/plasma_applet_systemtray.so
#16 0x00007f2f0e7ad07d in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#17 0x00007f2f0ee8e07c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#18 0x00007f2f0ee9534e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#19 0x00007f2f0ff4c586 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#20 0x00007f2f0e79dbfc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#21 0x00007f2f0e79e80a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#22 0x00007f2f0e7c6583 in ?? () from /usr/lib/libQtCore.so.4
#23 0x00007f2f08fe31fe in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0x00007f2f08fe6bb8 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#25 0x00007f2f08fe6ce0 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0x00007f2f0e7c6123 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#27 0x00007f2f0ef2114e in ?? () from /usr/lib/libQtGui.so.4
#28 0x00007f2f0e79c532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#29 0x00007f2f0e79c904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#30 0x00007f2f0e79eab9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#31 0x00007f2f117ad28f in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#32 0x00007f2f1143b9ed in __libc_start_main () from /lib/libc.so.6
#33 0x0000000000400629 in _start ()

Reported using DrKonqi