Application that crashed: kopete
Version of the application: 0.70.90
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.2
Operating System: Linux 2.6.30-8-generic x86_64
Distribution: Ubuntu karmic (development branch)

What I was doing when the application crashed:
kopete was running with both aim and yahoo users logged out, leaving facebook set to away as it doesn't seem to logout.  I logged out of the desktop and the crash handler appeared.

 -- Backtrace:
Application: Kopete (kopete), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f43838fb4fb in QString::length (this=0xfffffff0, other=...) at ../../include/QtCore/../../src/corelib/tools/qstring.h:683
#6  QString::operator< (this=0xfffffff0, other=...) at tools/qstring.cpp:1973
#7  0x00007f43706a588e in ?? () from /usr/lib/kde4/kopete_facebook.so
#8  0x00007f43857dda35 in Kopete::MetaContact::slotProtocolLoaded (this=0x29f7270, p=0x2899bd0) at ../../../kopete/libkopete/kopetemetacontact.cpp:1061
#9  0x00007f43857e19c9 in Kopete::MetaContact::qt_metacall (this=0x29f7270, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff2ff553f0) at ./kopetemetacontact.moc:181
#10 0x00007f43839b6e1c in QMetaObject::activate (sender=0x27549a8, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x2923bac) at kernel/qobject.cpp:3113
#11 0x00007f43857f2842 in Kopete::PluginManager::protocolLoaded (this=0xfffffff0, _t1=0x2899bd0) at ./kopetepluginmanager.moc:140
#12 0x00007f43857f43a6 in Kopete::PluginManager::loadPluginInternal (this=<value optimized out>, pluginId=<value optimized out>) at ../../../kopete/libkopete/kopetepluginmanager.cpp:394
#13 0x00007f43857f51ac in Kopete::PluginManager::slotLoadNextPlugin (this=0x27549a8) at ../../../kopete/libkopete/kopetepluginmanager.cpp:330
#14 0x00007f43857f7878 in Kopete::PluginManager::qt_metacall (this=0x27549a8, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff2ff558f0) at ./kopetepluginmanager.moc:114
#15 0x00007f43839b6e1c in QMetaObject::activate (sender=0x285ba70, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x2923bac) at kernel/qobject.cpp:3113
#16 0x00007f43839bbe5f in QSingleShotTimer::timerEvent (this=0x285ba70) at kernel/qtimer.cpp:298
#17 0x00007f43839b0dc3 in QObject::event (this=0x285ba70, e=0x7fff2ff551e0) at kernel/qobject.cpp:1075
#18 0x00007f4382e4a62c in QApplicationPrivate::notify_helper (this=0x246bd70, receiver=0x285ba70, e=0x7fff2ff55f00) at kernel/qapplication.cpp:4056
#19 0x00007f4382e518fe in QApplication::notify (this=0x7fff2ff56250, receiver=0x285ba70, e=0x7fff2ff55f00) at kernel/qapplication.cpp:4021
#20 0x00007f43845af3f6 in KApplication::notify (this=0x7fff2ff56250, receiver=0x285ba70, event=0x7fff2ff55f00) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x00007f43839a1c6c in QCoreApplication::notifyInternal (this=0x7fff2ff56250, receiver=0x285ba70, event=0x7fff2ff55f00) at kernel/qcoreapplication.cpp:610
#22 0x00007f43839cc912 in QCoreApplication::sendEvent (this=0x247d140) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (this=0x247d140) at kernel/qeventdispatcher_unix.cpp:572
#24 0x00007f43839ca2ad in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:165
#25 0x00007f437e3989fe in g_main_dispatch (context=0x247c120) at /build/buildd/glib2.0-2.21.3/glib/gmain.c:1960
#26 IA__g_main_context_dispatch (context=0x247c120) at /build/buildd/glib2.0-2.21.3/glib/gmain.c:2513
#27 0x00007f437e39c3c8 in g_main_context_iterate (context=0x247c120, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.21.3/glib/gmain.c:2591
#28 0x00007f437e39c4f0 in IA__g_main_context_iteration (context=0x247c120, may_block=1) at /build/buildd/glib2.0-2.21.3/glib/gmain.c:2654
#29 0x00007f43839ca1f6 in QEventDispatcherGlib::processEvents (this=0x2444390, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#30 0x00007f4382edeace in QGuiEventDispatcherGlib::processEvents (this=0xfffffff0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#31 0x00007f43839a0572 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#32 0x00007f43839a0944 in QEventLoop::exec (this=0x7fff2ff561a0, flags=) at kernel/qeventloop.cpp:201
#33 0x00007f43839a2af9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#34 0x00000000004155a6 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../kopete/kopete/main.cpp:104

Reported using DrKonqi