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 2.6.31-18-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I just returned from a 15 minute (or so) break and found the crash information. It happened a few times before with the same circumstances. I usually have several windows opened at thew same time. Most commons is a combination of Dolphin, Firefox, Thunderbird, Kate, OpenOffice.org (Writer and/or Calc).

 -- Backtrace:
Application: Plasma-werkgebied (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb77bc700 (LWP 2583))]

Thread 2 (Thread 0xac5cbb70 (LWP 2588)):
#0  0x001f6422 in __kernel_vsyscall ()
#1  0x001dfe15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x00be487d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x002cae67 in QWaitConditionPrivate::wait (this=0x9085c18, mutex=0x9085c14, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x9085c18, mutex=0x9085c14, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x05a04922 in QHostInfoAgent::run (this=0x9085c08) at kernel/qhostinfo.cpp:260
#6  0x002c9e32 in QThreadPrivate::start (arg=0x9085c08) at thread/qthread_unix.cpp:188
#7  0x001db80e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x00bd78de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb77bc700 (LWP 2583)):
[KCrash Handler]
#6  0x0071dd57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x01aed70e in qt_x11_getX11InfoForWindow (xinfo=0x97921c4, a=...) at kernel/qwidget_x11.cpp:400
#8  0x01af4b4e in QWidgetPrivate::create_sys (this=0x97920d0, window=16817482, initializeWindow=true, destroyOldWindow=true) at kernel/qwidget_x11.cpp:545
#9  0x01ab5b1c in QWidget::create (this=0x9798f78, window=16817482, initializeWindow=true, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1253
#10 0x08360c1e in SystemTray::X11EmbedContainer::embedSystemTrayClient (this=0x9798f78, clientId=50331843) at ../../../../plasma/applets/systemtray/protocols/fdo/x11embedcontainer.cpp:110
#11 0x0835c3f0 in SystemTray::FdoGraphicsWidget::setupXEmbedDelegate (this=0x977bbb0) at ../../../../plasma/applets/systemtray/protocols/fdo/fdographicswidget.cpp:159
#12 0x0835c4cb in SystemTray::FdoGraphicsWidget::qt_metacall (this=0x977bbb0, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0xbff51d6c) at ./fdographicswidget.moc:78
#13 0x003d0263 in QMetaObject::activate (sender=0x92638d0, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#14 0x003d0ec2 in QMetaObject::activate (sender=0x92638d0, m=0x4aa908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#15 0x003d5387 in QSingleShotTimer::timeout (this=0x92638d0) at .moc/release-shared/qtimer.moc:76
#16 0x003d549c in QSingleShotTimer::timerEvent (this=0x92638d0) at kernel/qtimer.cpp:298
#17 0x003ca3bf in QObject::event (this=0x92638d0, e=0xbff52200) at kernel/qobject.cpp:1075
#18 0x01a5ef54 in QApplicationPrivate::notify_helper (this=0x8bac008, receiver=0x92638d0, e=0xbff52200) at kernel/qapplication.cpp:4056
#19 0x01a6667c in QApplication::notify (this=0x8ba5f10, receiver=0x92638d0, e=0xbff52200) at kernel/qapplication.cpp:3603
#20 0x0114ebfa in KApplication::notify (this=0x8ba5f10, receiver=0x92638d0, event=0xbff52200) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x003ba6cb in QCoreApplication::notifyInternal (this=0x8ba5f10, receiver=0x92638d0, event=0xbff52200) at kernel/qcoreapplication.cpp:610
#22 0x003e77ce in QCoreApplication::sendEvent (this=0x8bae7cc) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (this=0x8bae7cc) at kernel/qeventdispatcher_unix.cpp:572
#24 0x003e50e0 in timerSourceDispatch (source=0x8bae798) at kernel/qeventdispatcher_glib.cpp:165
#25 0x00157e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#26 0x0015b730 in ?? () from /lib/libglib-2.0.so.0
#27 0x0015b863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#28 0x003e502c in QEventDispatcherGlib::processEvents (this=0x8babb10, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#29 0x01affbe5 in QGuiEventDispatcherGlib::processEvents (this=0x8babb10, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#30 0x003b8c79 in QEventLoop::processEvents (this=0xbff524c4, flags=) at kernel/qeventloop.cpp:149
#31 0x003b90ca in QEventLoop::exec (this=0xbff524c4, flags=...) at kernel/qeventloop.cpp:201
#32 0x003bb53f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#33 0x01a5edd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#34 0x0730080d in kdemain (argc=1, argv=0x8b309e0) 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=0x8b6f418 "", 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=0xbff52d24, envp=0xbff52d30) at ../../kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 207930

Reported using DrKonqi