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 2.6.31-17-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I have dual monitors set up on my laptop using this "fix" https://bugs.launchpad.net/kdebase/+bug/403610. I was browsing in firefox on my laptop monitor when all of a sudden my external monitor went black, then when I hovered over it, it reappeared and worked fine, but the crash report showed up.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb7730700 (LWP 1822))]

Thread 2 (Thread 0xabcffb70 (LWP 1825)):
#0  0x00110422 in __kernel_vsyscall ()
#1  0x00817e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x009c787d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x00160e67 in QWaitConditionPrivate::wait (this=0x96b04d8, mutex=0x96b04d4, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x96b04d8, mutex=0x96b04d4, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x06f32922 in QHostInfoAgent::run (this=0x96b04c8) at kernel/qhostinfo.cpp:260
#6  0x0015fe32 in QThreadPrivate::start (arg=0x96b04c8) at thread/qthread_unix.cpp:188
#7  0x0081380e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x009ba8de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb7730700 (LWP 1822)):
[KCrash Handler]
#6  0x0036bd57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x03f1370e in qt_x11_getX11InfoForWindow (xinfo=0x9f0f18c, a=...) at kernel/qwidget_x11.cpp:400
#8  0x03f1ab4e in QWidgetPrivate::create_sys (this=0x9f0f098, window=16802431, initializeWindow=true, destroyOldWindow=true) at kernel/qwidget_x11.cpp:545
#9  0x03edbb1c in QWidget::create (this=0x9b249d8, window=16802431, initializeWindow=true, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1253
#10 0x016fac1e in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x016f63f0 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0x016f64cb in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#13 0x00266263 in QMetaObject::activate (sender=0x9ba6090, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#14 0x00266ec2 in QMetaObject::activate (sender=0x9ba6090, m=0x340908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#15 0x0026b387 in QSingleShotTimer::timeout (this=0x9ba6090) at .moc/release-shared/qtimer.moc:76
#16 0x0026b49c in QSingleShotTimer::timerEvent (this=0x9ba6090) at kernel/qtimer.cpp:298
#17 0x002603bf in QObject::event (this=0x9ba6090, e=0xbfe9d3c0) at kernel/qobject.cpp:1075
#18 0x03e84f54 in QApplicationPrivate::notify_helper (this=0x91dda68, receiver=0x9ba6090, e=0xbfe9d3c0) at kernel/qapplication.cpp:4056
#19 0x03e8c67c in QApplication::notify (this=0x91b6bf0, receiver=0x9ba6090, e=0xbfe9d3c0) at kernel/qapplication.cpp:3603
#20 0x00fe5bfa in KApplication::notify (this=0x91b6bf0, receiver=0x9ba6090, event=0xbfe9d3c0) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x002506cb in QCoreApplication::notifyInternal (this=0x91b6bf0, receiver=0x9ba6090, event=0xbfe9d3c0) at kernel/qcoreapplication.cpp:610
#22 0x0027d7ce in QCoreApplication::sendEvent (this=0x91e0634) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (this=0x91e0634) at kernel/qeventdispatcher_unix.cpp:572
#24 0x0027b0e0 in timerSourceDispatch (source=0x91e0600) at kernel/qeventdispatcher_glib.cpp:165
#25 0x00a6be88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#26 0x00a6f730 in ?? () from /lib/libglib-2.0.so.0
#27 0x00a6f863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#28 0x0027b02c in QEventDispatcherGlib::processEvents (this=0x91dd858, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#29 0x03f25be5 in QGuiEventDispatcherGlib::processEvents (this=0x91dd858, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#30 0x0024ec79 in QEventLoop::processEvents (this=0xbfe9d684, flags=) at kernel/qeventloop.cpp:149
#31 0x0024f0ca in QEventLoop::exec (this=0xbfe9d684, flags=...) at kernel/qeventloop.cpp:201
#32 0x0025153f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#33 0x03e84dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#34 0x062e280d 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=0x9183c80 "", 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=0xbfe9dee4, envp=0xbfe9def0) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi