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 2.6.31-19-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Plasma desktop ocassionally crashes for no apparent reason.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb7810700 (LWP 1639))]

Thread 2 (Thread 0xac742b70 (LWP 1640)):
#0  0x00f49422 in __kernel_vsyscall ()
#1  0x007b6e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x0074187d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x0015fe67 in QWaitConditionPrivate::wait (this=0xa138798, mutex=0xa138794, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0xa138798, mutex=0xa138794, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x00e48922 in QHostInfoAgent::run (this=0xa138788) at kernel/qhostinfo.cpp:260
#6  0x0015ee32 in QThreadPrivate::start (arg=0xa138788) at thread/qthread_unix.cpp:188
#7  0x007b280e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x007348de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb7810700 (LWP 1639)):
[KCrash Handler]
#6  0x0036ad57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x08c4170e in qt_x11_getX11InfoForWindow (xinfo=0x9df9574, a=...) at kernel/qwidget_x11.cpp:400
#8  0x08c48b4e in QWidgetPrivate::create_sys (this=0x9df9480, window=29411026, initializeWindow=true, destroyOldWindow=true) at kernel/qwidget_x11.cpp:545
#9  0x08c09b1c in QWidget::create (this=0xa0c3230, window=29411026, initializeWindow=true, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1253
#10 0x0567cc1e in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x056783f0 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0x056784cb in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#13 0x00265263 in QMetaObject::activate (sender=0xa121a70, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#14 0x00265ec2 in QMetaObject::activate (sender=0xa121a70, m=0x33f908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#15 0x0026a387 in QSingleShotTimer::timeout (this=0xa121a70) at .moc/release-shared/qtimer.moc:76
#16 0x0026a49c in QSingleShotTimer::timerEvent (this=0xa121a70) at kernel/qtimer.cpp:298
#17 0x0025f3bf in QObject::event (this=0xa121a70, e=0xbf90ae90) at kernel/qobject.cpp:1075
#18 0x08bb2f54 in QApplicationPrivate::notify_helper (this=0x9dfa7c8, receiver=0xa121a70, e=0xbf90ae90) at kernel/qapplication.cpp:4056
#19 0x08bba67c in QApplication::notify (this=0x9dd3a60, receiver=0xa121a70, e=0xbf90ae90) at kernel/qapplication.cpp:3603
#20 0x0111cbfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#21 0x0024f6cb in QCoreApplication::notifyInternal (this=0x9dd3a60, receiver=0xa121a70, event=0xbf90ae90) at kernel/qcoreapplication.cpp:610
#22 0x0027c7ce in QCoreApplication::sendEvent (this=0x9dfcfac) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (this=0x9dfcfac) at kernel/qeventdispatcher_unix.cpp:572
#24 0x0027a0e0 in timerSourceDispatch (source=0x9dfcf78) at kernel/qeventdispatcher_glib.cpp:165
#25 0x005abe88 in g_main_dispatch (context=0x9dfc890) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:1960
#26 IA__g_main_context_dispatch (context=0x9dfc890) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2513
#27 0x005af730 in g_main_context_iterate (context=0x9dfc890, block=<value optimized out>, dispatch=1, self=0x9dfa2d0) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2591
#28 0x005af863 in IA__g_main_context_iteration (context=0x9dfc890, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#29 0x0027a02c in QEventDispatcherGlib::processEvents (this=0x9dfa5b8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#30 0x08c53be5 in QGuiEventDispatcherGlib::processEvents (this=0x9dfa5b8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#31 0x0024dc79 in QEventLoop::processEvents (this=0xbf90b154, flags=) at kernel/qeventloop.cpp:149
#32 0x0024e0ca in QEventLoop::exec (this=0xbf90b154, flags=...) at kernel/qeventloop.cpp:201
#33 0x0025053f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#34 0x08bb2dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#35 0x086ae80d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#36 0x0804dde1 in _start ()

Reported using DrKonqi