Application that crashed: konqueror
Version of the application: 4.3.1 (KDE 4.3.1)
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.30-2-amd64 x86_64
Distribution: Debian GNU/Linux testing (squeeze)

What I was doing when the application crashed:
I added the bar which allows to divide orizontally the window. I divided it with the same web page up and down. When I tried to move the address bar upward konqueror suddenly crashed.

 -- Backtrace:
Application: Konqueror (konqueror), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  0x0000000000000000 in ?? ()
#6  0x00007fd9ae00397a in fixToolBarOrientation (item=0x1d13b90, dockPos=2) at widgets/qmainwindowlayout.cpp:1483
#7  0x00007fd9ae00b521 in QMainWindowLayout::unplug (this=0x15c7db0, widget=0x17a6800) at widgets/qmainwindowlayout.cpp:1809
#8  0x00007fd9ae069ea2 in QToolBarPrivate::startDrag (this=0x17a7060, moving=false) at widgets/qtoolbar.cpp:233
#9  0x00007fd9ae06a1a2 in QToolBarPrivate::mouseMoveEvent (this=0x17a7060, event=0x7fff28169ae0) at widgets/qtoolbar.cpp:352
#10 0x00007fd9ae06a640 in QToolBar::event (this=0x17a6800, event=0x2) at widgets/qtoolbar.cpp:1153
#11 0x00007fd9adc3001d in QApplicationPrivate::notify_helper (this=0x13d46d0, receiver=0x17a6800, e=0x7fff28169ae0) at kernel/qapplication.cpp:4065
#12 0x00007fd9adc387ca in QApplication::notify (this=<value optimized out>, receiver=0x17a6800, e=0x7fff28169ae0) at kernel/qapplication.cpp:3767
#13 0x00007fd9af3cb0db in KApplication::notify (this=0x7fff2816ba40, receiver=0x17a6800, event=0x7fff28169ae0) at ../../kdeui/kernel/kapplication.cpp:302
#14 0x00007fd9ae7b6c9c in QCoreApplication::notifyInternal (this=0x7fff2816ba40, receiver=0x17a6800, event=0x7fff28169ae0) at kernel/qcoreapplication.cpp:610
#15 0x00007fd9adc37a78 in QCoreApplication::sendSpontaneousEvent (receiver=0x17a6800, event=0x7fff28169ae0, alienWidget=0x174de60, nativeWidget=0x154b2a0, buttonDown=<value optimized out>, 
    lastMouseReceiver=...) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#16 QApplicationPrivate::sendMouseEvent (receiver=0x17a6800, event=0x7fff28169ae0, alienWidget=0x174de60, nativeWidget=0x154b2a0, buttonDown=<value optimized out>, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#17 0x00007fd9adca0659 in QETWidget::translateMouseEvent (this=0x154b2a0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4411
#18 0x00007fd9adc9f40f in QApplication::x11ProcessEvent (this=0x7fff2816ba40, event=0x7fff2816b4b0) at kernel/qapplication_x11.cpp:3552
#19 0x00007fd9adcc776c in x11EventSourceDispatch (s=0x13d84f0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#20 0x00007fd9aa90512a in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#21 0x00007fd9aa908988 in ?? () from /lib/libglib-2.0.so.0
#22 0x00007fd9aa908b3c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#23 0x00007fd9ae7df39c in QEventDispatcherGlib::processEvents (this=0x13b7490, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#24 0x00007fd9adcc6f1f in QGuiEventDispatcherGlib::processEvents (this=0x1d13b90, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#25 0x00007fd9ae7b5562 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#26 0x00007fd9ae7b5934 in QEventLoop::exec (this=0x7fff2816b7e0, flags=...) at kernel/qeventloop.cpp:201
#27 0x00007fd9ae7b7ba4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#28 0x00007fd9b0f130a9 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../apps/konqueror/src/konqmain.cpp:257
#29 0x00007fd9b0b0da8d in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fff2816c4b8) at libc-start.c:222
#30 0x0000000000400649 in _start () at ../sysdeps/x86_64/elf/start.S:113

Reported using DrKonqi