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 2.6.31-14-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I dont know what when wrong and is not reprodusable

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb7848700 (LWP 1304))]

Thread 2 (Thread 0xac78cb70 (LWP 1305)):
#0  0x00d36422 in __kernel_vsyscall ()
#1  0x00257e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x02bd978d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x00389e67 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0x059b2922 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0x00388e32 in ?? () from /usr/lib/libQtCore.so.4
#6  0x0025380e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0x02bcc7ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb7848700 (LWP 1304)):
[KCrash Handler]
#6  0x00137d57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x0117c70e in ?? () from /usr/lib/libQtGui.so.4
#8  0x01183b4e in QWidgetPrivate::create_sys(unsigned long, bool, bool) () from /usr/lib/libQtGui.so.4
#9  0x01144b1c in QWidget::create(unsigned long, bool, bool) () from /usr/lib/libQtGui.so.4
#10 0x01d56c1e in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x01d523f0 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0x01d524cb in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#13 0x0048f263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#14 0x0048fec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#15 0x00494387 in ?? () from /usr/lib/libQtCore.so.4
#16 0x0049449c in ?? () from /usr/lib/libQtCore.so.4
#17 0x004893bf in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#18 0x010edf54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#19 0x010f567c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x009c3bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#21 0x004796cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#22 0x004a67ce in ?? () from /usr/lib/libQtCore.so.4
#23 0x004a40e0 in ?? () from /usr/lib/libQtCore.so.4
#24 0x00bbbe78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#25 0x00bbf720 in ?? () from /lib/libglib-2.0.so.0
#26 0x00bbf853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#27 0x004a402c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#28 0x0118ebe5 in ?? () from /usr/lib/libQtGui.so.4
#29 0x00477c79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#30 0x004780ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#31 0x0047a53f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#32 0x010eddd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#33 0x03e9880d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#34 0x0804dde1 in _start ()

Reported using DrKonqi