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 2.6.31-20-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I was listening to a radio show using Firefox, and hadn't touched the computer for about 15 minutes.  When I looked at the screen, plasma desktop had crashed, but Firefox was still running.  The only other program running in the foreground at the time was korganiser.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76fe700 (LWP 1841))]

Thread 2 (Thread 0x9a13b70 (LWP 1844)):
#0  0x00927422 in __kernel_vsyscall ()
#1  0x00cafe15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x0077d87d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x009c4e67 in QWaitConditionPrivate::wait (this=0xa018d38, mutex=0xa018d34, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0xa018d38, mutex=0xa018d34, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x02947922 in QHostInfoAgent::run (this=0xa018d28) at kernel/qhostinfo.cpp:260
#6  0x009c3e32 in QThreadPrivate::start (arg=0xa018d28) at thread/qthread_unix.cpp:188
#7  0x00cab80e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x007708de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb76fe700 (LWP 1841)):
[KCrash Handler]
#6  0x0044cd57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x03c2070e in qt_x11_getX11InfoForWindow (xinfo=0xa7d6d8c, a=...) at kernel/qwidget_x11.cpp:400
#8  0x03c27b4e in QWidgetPrivate::create_sys (this=0xa7d6c98, window=16855618, initializeWindow=true, destroyOldWindow=true) at kernel/qwidget_x11.cpp:545
#9  0x03be8b1c in QWidget::create (this=0xa7d6c78, window=16855618, initializeWindow=true, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1253
#10 0x058e3c1e in SystemTray::X11EmbedContainer::embedSystemTrayClient (this=0xa7d6c78, clientId=56623207) at ../../../../plasma/applets/systemtray/protocols/fdo/x11embedcontainer.cpp:110
#11 0x058df3f0 in SystemTray::FdoGraphicsWidget::setupXEmbedDelegate (this=0xa7dc940) at ../../../../plasma/applets/systemtray/protocols/fdo/fdographicswidget.cpp:159
#12 0x058df4cb in SystemTray::FdoGraphicsWidget::qt_metacall (this=0xa7dc940, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0xbfcb267c) at ./fdographicswidget.moc:78
#13 0x00aca263 in QMetaObject::activate (sender=0xa354880, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#14 0x00acaec2 in QMetaObject::activate (sender=0xa354880, m=0xba4908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#15 0x00acf387 in QSingleShotTimer::timeout (this=0xa354880) at .moc/release-shared/qtimer.moc:76
#16 0x00acf49c in QSingleShotTimer::timerEvent (this=0xa354880) at kernel/qtimer.cpp:298
#17 0x00ac43bf in QObject::event (this=0xa354880, e=0xbfcb2b10) at kernel/qobject.cpp:1075
#18 0x03b91f54 in QApplicationPrivate::notify_helper (this=0x9c400f8, receiver=0xa354880, e=0xbfcb2b10) at kernel/qapplication.cpp:4056
#19 0x03b9967c in QApplication::notify (this=0x9c19310, receiver=0xa354880, e=0xbfcb2b10) at kernel/qapplication.cpp:3603
#20 0x055dcbfa in KApplication::notify (this=0x9c19310, receiver=0xa354880, event=0xbfcb2b10) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x00ab46cb in QCoreApplication::notifyInternal (this=0x9c19310, receiver=0xa354880, event=0xbfcb2b10) at kernel/qcoreapplication.cpp:610
#22 0x00ae17ce in QCoreApplication::sendEvent (this=0x9c42d34) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (this=0x9c42d34) at kernel/qeventdispatcher_unix.cpp:572
#24 0x00adf0e0 in timerSourceDispatch (source=0x9c42d00) at kernel/qeventdispatcher_glib.cpp:165
#25 0x00821e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#26 0x00825730 in ?? () from /lib/libglib-2.0.so.0
#27 0x00825863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#28 0x00adf02c in QEventDispatcherGlib::processEvents (this=0x9c3fee8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#29 0x03c32be5 in QGuiEventDispatcherGlib::processEvents (this=0x9c3fee8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#30 0x00ab2c79 in QEventLoop::processEvents (this=0xbfcb2dd4, flags=) at kernel/qeventloop.cpp:149
#31 0x00ab30ca in QEventLoop::exec (this=0xbfcb2dd4, flags=...) at kernel/qeventloop.cpp:201
#32 0x00ab553f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#33 0x03b91dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#34 0x0393180d in kdemain (argc=1, argv=0x9c024d0) at ../../../../plasma/shells/desktop/main.cpp:50
#35 0x0804dde1 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x9bcfa98 "", 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=0xbfcb3634, envp=0xbfcb3640) at ../../kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 230519

Reported using DrKonqi