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:
Plasma crashed shortly after booting up PC (5/10 minutes), was downloading packages with KPackageKit, seeing a movie with totem and had Kmixer's mixer window open. Its not the first time a similar crash.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb77fb700 (LWP 1739))]

Thread 2 (Thread 0xac706b70 (LWP 1740)):
#0  0x005aa422 in __kernel_vsyscall ()
#1  0x00386e15 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:122
#2  0x01dd178d in __pthread_cond_wait (cond=0x9ab0fb0, mutex=0x9ab0f98) at forward.c:139
#3  0x00943e67 in QWaitConditionPrivate::wait (this=0x9ab2128, mutex=0x9ab2124, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x9ab2128, mutex=0x9ab2124, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x024c2922 in QHostInfoAgent::run (this=0x9ab2118) at kernel/qhostinfo.cpp:260
#6  0x00942e32 in QThreadPrivate::start (arg=0x9ab2118) at thread/qthread_unix.cpp:188
#7  0x0038280e in start_thread (arg=0xac706b70) at pthread_create.c:300
#8  0x01dc47ee in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb77fb700 (LWP 1739)):
[KCrash Handler]
#6  0x00488d57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x0116170e in qt_x11_getX11InfoForWindow (xinfo=0x9dca7cc, a=...) at kernel/qwidget_x11.cpp:400
#8  0x01168b4e in QWidgetPrivate::create_sys (this=0x9dca6d8, window=21134990, initializeWindow=true, destroyOldWindow=true) at kernel/qwidget_x11.cpp:545
#9  0x01129b1c in QWidget::create (this=0x9a9f738, window=21134990, initializeWindow=true, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1253
#10 0x01fecc1e in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x01fe83f0 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0x01fe84cb in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#13 0x00a49263 in QMetaObject::activate (sender=0x9e9f8b0, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#14 0x00a49ec2 in QMetaObject::activate (sender=0x9e9f8b0, m=0xb23908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#15 0x00a4e387 in QSingleShotTimer::timeout (this=0x9e9f8b0) at .moc/release-shared/qtimer.moc:76
#16 0x00a4e49c in QSingleShotTimer::timerEvent (this=0x9e9f8b0) at kernel/qtimer.cpp:298
#17 0x00a433bf in QObject::event (this=0x9e9f8b0, e=0xbfb66890) at kernel/qobject.cpp:1075
#18 0x010d2f54 in QApplicationPrivate::notify_helper (this=0x92a1cc8, receiver=0x9e9f8b0, e=0xbfb66890) at kernel/qapplication.cpp:4056
#19 0x010da67c in QApplication::notify (this=0x927ad80, receiver=0x9e9f8b0, e=0xbfb66890) at kernel/qapplication.cpp:3603
#20 0x00df2bfa in KApplication::notify (this=0x927ad80, receiver=0x9e9f8b0, event=0xbfb66890) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x00a336cb in QCoreApplication::notifyInternal (this=0x927ad80, receiver=0x9e9f8b0, event=0xbfb66890) at kernel/qcoreapplication.cpp:610
#22 0x00a607ce in QCoreApplication::sendEvent (this=0x92a4494) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (this=0x92a4494) at kernel/qeventdispatcher_unix.cpp:572
#24 0x00a5e0e0 in timerSourceDispatch (source=0x92a4460) at kernel/qeventdispatcher_glib.cpp:165
#25 0x00867e78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#26 0x0086b720 in ?? () from /lib/libglib-2.0.so.0
#27 0x0086b853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#28 0x00a5e02c in QEventDispatcherGlib::processEvents (this=0x92a1a88, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#29 0x01173be5 in QGuiEventDispatcherGlib::processEvents (this=0x92a1a88, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#30 0x00a31c79 in QEventLoop::processEvents (this=0xbfb66b54, flags=) at kernel/qeventloop.cpp:149
#31 0x00a320ca in QEventLoop::exec (this=0xbfb66b54, flags=...) at kernel/qeventloop.cpp:201
#32 0x00a3453f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#33 0x010d2dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#34 0x01be380d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#35 0x0804dde1 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x9246d80 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x80511a5 "0") at ../../kinit/kinit.cpp:677
#36 0x0804ea35 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#37 0x0804eeac in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1362
#38 0x0804fbaf in main (argc=2, argv=0xbfb673b4, envp=0xbfb673c0) at ../../kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 208458

Reported using DrKonqi