Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-15-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Crashed while drag and drop the button list with "New Message/Feed/etc"

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0x006eb8df in KTraderParse_destroy (node=0x9225018) at ../../kdecore/services/ktraderparse.cpp:175
#7  0x006efb92 in yydestruct (yymsg=<value optimized out>, yytype=<value optimized out>, yyvaluep=0x9205030) at yacc.y:75
#8  0x006eff74 in kiotraderparse (_scanner=0x9173918) at yacc.c:1943
#9  0x013052c9 in QMainWindowLayout::unplug (this=0x9173918, widget=0x94b97f8) at widgets/qmainwindowlayout.cpp:1809
#10 0x0136e865 in QToolBarPrivate::startDrag (this=0x94b7728, moving=true) at widgets/qtoolbar.cpp:233
#11 0x0136eb68 in QToolBarPrivate::mouseMoveEvent (this=0x94b7728, event=0xbfd28790) at widgets/qtoolbar.cpp:352
#12 0x0136f084 in QToolBar::event (this=0x94b97f8, event=0xbfd28790) at widgets/qtoolbar.cpp:1153
#13 0x00ed9f54 in QApplicationPrivate::notify_helper (this=0x9166518, receiver=0x94b97f8, e=0xbfd28790) at kernel/qapplication.cpp:4056
#14 0x00ee2033 in QApplication::notify (this=0xbfd2a174, receiver=0x94b97f8, e=0xbfd28790) at kernel/qapplication.cpp:3758
#15 0x00337bfa in KApplication::notify (this=0xbfd2a174, receiver=0x94b97f8, event=0xbfd28790) at ../../kdeui/kernel/kapplication.cpp:302
#16 0x00ac16cb in QCoreApplication::notifyInternal (this=0xbfd2a174, receiver=0x94b97f8, event=0xbfd28790) at kernel/qcoreapplication.cpp:610
#17 0x00ee0f6e in QCoreApplication::sendSpontaneousEvent (receiver=0x94b97f8, event=0xbfd28790, alienWidget=0x91e55d8, nativeWidget=0x91736e8, buttonDown=0x1754aa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#18 QApplicationPrivate::sendMouseEvent (receiver=0x94b97f8, event=0xbfd28790, alienWidget=0x91e55d8, nativeWidget=0x91736e8, buttonDown=0x1754aa0, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#19 0x00f4f7c0 in QETWidget::translateMouseEvent (this=0x91736e8, event=0xbfd29ddc) at kernel/qapplication_x11.cpp:4409
#20 0x00f4ec4b in QApplication::x11ProcessEvent (this=0xbfd2a174, event=0xbfd29ddc) at kernel/qapplication_x11.cpp:3428
#21 0x00f7b502 in x11EventSourceDispatch (s=0x91694b0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#22 0x03d61e78 in g_main_dispatch (context=0x9168c90) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:1960
#23 IA__g_main_context_dispatch (context=0x9168c90) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2513
#24 0x03d65720 in g_main_context_iterate (context=0x9168c90, block=<value optimized out>, dispatch=1, self=0x9175d40) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2591
#25 0x03d65853 in IA__g_main_context_iteration (context=0x9168c90, may_block=1) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2654
#26 0x00aec02c in QEventDispatcherGlib::processEvents (this=0x91469f8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#27 0x00f7abe5 in QGuiEventDispatcherGlib::processEvents (this=0x91469f8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#28 0x00abfc79 in QEventLoop::processEvents (this=0xbfd2a0d4, flags=) at kernel/qeventloop.cpp:149
#29 0x00ac00ca in QEventLoop::exec (this=0xbfd2a0d4, flags=...) at kernel/qeventloop.cpp:201
#30 0x00ac253f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#31 0x00ed9dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#32 0x0804b4e6 in _start ()

Reported using DrKonqi