Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-19-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I've closed Firefox and the Shell client (the only two apps that were running), opened KTorrent and began downloading a torrent. KTorrent was the only app running and I wasn't on the machine at the time the crash occurred. When I turned the monitor back on to see if the torrent had finished (more than 1h30min later) the crash warning was... well, just there

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76f7700 (LWP 2483))]

Thread 2 (Thread 0xaa7d3b70 (LWP 2486)):
#0  0x003cc422 in __kernel_vsyscall ()
#1  0x00135e15 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:122
#2  0x00a8387d in __pthread_cond_wait (cond=0x8ac4498, mutex=0x8ac4480) at forward.c:139
#3  0x00ba4e67 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0x03cf8922 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0x00ba3e32 in ?? () from /usr/lib/libQtCore.so.4
#6  0x0013180e in start_thread (arg=0xaa7d3b70) at pthread_create.c:300
#7  0x00a768de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb76f7700 (LWP 2483)):
[KCrash Handler]
#6  0x00245d57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x06cf470e in ?? () from /usr/lib/libQtGui.so.4
#8  0x06cfbb4e in QWidgetPrivate::create_sys(unsigned long, bool, bool) () from /usr/lib/libQtGui.so.4
#9  0x06cbcb1c in QWidget::create(unsigned long, bool, bool) () from /usr/lib/libQtGui.so.4
#10 0x015cdc1e in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x015c93f0 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0x015c94cb in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#13 0x00caa263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#14 0x00caaec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#15 0x00caf387 in ?? () from /usr/lib/libQtCore.so.4
#16 0x00caf49c in ?? () from /usr/lib/libQtCore.so.4
#17 0x00ca43bf in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#18 0x06c65f54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#19 0x06c6d67c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x0104abfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#21 0x00c946cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#22 0x00cc17ce in ?? () from /usr/lib/libQtCore.so.4
#23 0x00cbf0e0 in ?? () from /usr/lib/libQtCore.so.4
#24 0x06932e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#25 0x06936730 in ?? () from /lib/libglib-2.0.so.0
#26 0x06936863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#27 0x00cbf02c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#28 0x06d06be5 in ?? () from /usr/lib/libQtGui.so.4
#29 0x00c92c79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#30 0x00c930ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#31 0x00c9553f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#32 0x06c65dd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#33 0x0137280d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#34 0x0804dde1 in _start ()

This bug may be a duplicate of or related to bug 228369

Reported using DrKonqi