Application that crashed: kontact
Version of the application: 4.3.5
KDE Version: 4.3.5 (KDE 4.3.5)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-21-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
When I clicked "close" on the KMail icon's menu in the system tray, KMail crashed.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0x001481fc in QString (this=0xa0cb100) at /usr/include/qt4/QtCore/qstring.h:711
#7  Kontact::Plugin::identifier (this=0xa0cb100) at ../../kontactinterfaces/plugin.cpp:97
#8  0x0022350e in Kontact::MainWindow::activatePluginModule (this=0x9d39b68) at ../../../kontact/src/mainwindow.cpp:303
#9  0x002235c4 in Kontact::MainWindow::setActivePluginModule (this=0x9d39b68, module=...) at ../../../kontact/src/mainwindow.cpp:281
#10 0x0804bd0f in KontactApp::newInstance (this=0xbfbe7b24) at ../../../kontact/src/main.cpp:147
#11 0x004169e0 in KUniqueApplicationAdaptor::newInstance (this=0x9daf1c0, asn_id=..., args=...) at ../../kdeui/kernel/kuniqueapplication.cpp:459
#12 0x004170f2 in KUniqueApplicationAdaptor::qt_metacall (this=0x9daf1c0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfbe714c) at ./kuniqueapplication_p.moc:75
#13 0x009ad7b4 in QDBusConnectionPrivate::deliverCall (this=0x9d25c90, object=0x9daf1c0, msg=..., metaTypes=..., slotIdx=4) at qdbusintegrator.cpp:891
#14 0x009ae9c5 in QDBusConnectionPrivate::activateCall (this=0x9d25c90, object=0x9daf1c0, flags=337, msg=...) at qdbusintegrator.cpp:803
#15 0x009af234 in QDBusConnectionPrivate::activateObject (this=0x9d25c90, node=..., msg=..., pathStartPos=16) at qdbusintegrator.cpp:1347
#16 0x009af4da in QDBusActivateObjectEvent::placeMetaCall (this=0xa283798) at qdbusintegrator.cpp:1464
#17 0x074645fe in QObject::event (this=0xbfbe7b24, e=0xa283798) at kernel/qobject.cpp:1111
#18 0x07453ffb in QCoreApplication::event (this=0xbfbe7b24, e=0xa283798) at kernel/qcoreapplication.cpp:1434
#19 0x00b589a6 in QApplication::event (this=0xbfbe7b24, e=0xa283798) at kernel/qapplication.cpp:2317
#20 0x00b52f54 in QApplicationPrivate::notify_helper (this=0x9d31eb8, receiver=0xbfbe7b24, e=0xa283798) at kernel/qapplication.cpp:4056
#21 0x00b5a67c in QApplication::notify (this=0xbfbe7b24, receiver=0xbfbe7b24, e=0xa283798) at kernel/qapplication.cpp:3603
#22 0x0040f25a in KApplication::notify (this=0xbfbe7b24, receiver=0xbfbe7b24, event=0xa283798) at ../../kdeui/kernel/kapplication.cpp:302
#23 0x074546cb in QCoreApplication::notifyInternal (this=0xbfbe7b24, receiver=0xbfbe7b24, event=0xa283798) at kernel/qcoreapplication.cpp:610
#24 0x074552b2 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x9d0d820) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9d0d820) at kernel/qcoreapplication.cpp:1247
#26 0x0745547d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#27 0x0747f3ff in QCoreApplication::sendPostedEvents (s=0x9d40b98) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#28 postEventSourceDispatch (s=0x9d40b98) at kernel/qeventdispatcher_glib.cpp:210
#29 0x023d6e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#30 0x023da730 in ?? () from /lib/libglib-2.0.so.0
#31 0x023da863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#32 0x0747f02c in QEventDispatcherGlib::processEvents (this=0x9d0d9f8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#33 0x00bf3be5 in QGuiEventDispatcherGlib::processEvents (this=0x9d0d9f8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x07452c79 in QEventLoop::processEvents (this=0xbfbe7a84, flags=) at kernel/qeventloop.cpp:149
#35 0x074530ca in QEventLoop::exec (this=0xbfbe7a84, flags=...) at kernel/qeventloop.cpp:201
#36 0x0745553f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#37 0x00b52dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#38 0x0804b4e6 in main (argc=1, argv=0xbfbe7d44) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi