Application that crashed: dolphin
Version of the application: 1.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-14-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
1. I got the warning that disk space is low
2. I move a big file (~4.7G) from /home/$USER to another partation
3. df still says low space
4. I ringht click on my home foler and counter and calculate its size 
5. when finished, I cliked OK
6. dolphin crashed.

 -- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  KDirModelNode::rowNumber (this=0x0) at ../../kio/kio/kdirmodel.cpp:120
#6  0x00007fdab8d5be21 in KDirModelPrivate::indexForNode (this=<value optimized out>, node=<value optimized out>, rowNumber=-1) at ../../kio/kio/kdirmodel.cpp:284
#7  0x00007fdab8d607c6 in KDirModelPrivate::_k_slotNewItems (this=0x25d6490, directoryUrl=<value optimized out>, items=...) at ../../kio/kio/kdirmodel.cpp:377
#8  0x00007fdab8d61ba6 in KDirModel::qt_metacall (this=0x263f2a0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff8232a6f0) at ./kdirmodel.moc:82
#9  0x00007fdab5cd6ddc in QMetaObject::activate (sender=0x263f110, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0xffffffff) at kernel/qobject.cpp:3113
#10 0x00007fdab8d4592a in KDirLister::itemsAdded (this=0x0, _t1=<value optimized out>, _t2=<value optimized out>) at ./kdirlister.moc:268
#11 0x00007fdab8d466da in KDirLister::Private::emitItems (this=0x263f130) at ../../kio/kio/kdirlister.cpp:2303
#12 0x00007fdab8d51158 in KDirListerCache::processPendingUpdates (this=0x1ff0ce0) at ../../kio/kio/kdirlister.cpp:1796
#13 0x00007fdab8d51ace in KDirListerCache::slotFilesChanged (this=0x1ff0ce0, fileList=...) at ../../kio/kio/kdirlister.cpp:850
#14 0x00007fdab8d57dd0 in KDirListerCache::qt_metacall (this=0x1ff0ce0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff8232aae0) at ./kdirlister_p.moc:93
#15 0x00007fdab5cd6ddc in QMetaObject::activate (sender=0x1f63c40, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0xffffffff) at kernel/qobject.cpp:3113
#16 0x00007fdab8d63145 in OrgKdeKDirNotifyInterface::FilesChanged (this=0x0, _t1=<value optimized out>) at ./kdirnotify.moc:118
#17 0x00007fdab8d632b0 in OrgKdeKDirNotifyInterface::qt_metacall (this=0x1f63c40, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff8232ada0) at ./kdirnotify.moc:82
#18 0x00007fdab6b8cad4 in QDBusConnectionPrivate::deliverCall (this=<value optimized out>, object=<value optimized out>, msg=<value optimized out>, metaTypes=..., slotIdx=<value optimized out>)
    at qdbusintegrator.cpp:891
#19 0x00007fdab6b93def in QDBusCallDeliveryEvent::placeMetaCall(QObject*) () from /usr/lib/libQtDBus.so.4
#20 0x00007fdab5cd10f9 in QObject::event (this=0x1f63c40, e=0x2b60020) at kernel/qobject.cpp:1111
#21 0x00007fdab6154efc in QApplicationPrivate::notify_helper (this=0x1ee78f0, receiver=0x1f63c40, e=0x2b60020) at kernel/qapplication.cpp:4056
#22 0x00007fdab615c1ce in QApplication::notify (this=0x7fff8232b740, receiver=0x1f63c40, e=0x2b60020) at kernel/qapplication.cpp:4021
#23 0x00007fdab7489ab6 in KApplication::notify (this=0x7fff8232b740, receiver=0x1f63c40, event=0x2b60020) at ../../kdeui/kernel/kapplication.cpp:302
#24 0x00007fdab5cc1c2c in QCoreApplication::notifyInternal (this=0x7fff8232b740, receiver=0x1f63c40, event=0x2b60020) at kernel/qcoreapplication.cpp:610
#25 0x00007fdab5cc280a in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x1eb14d0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#26 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x1eb14d0) at kernel/qcoreapplication.cpp:1247
#27 0x00007fdab5cea533 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#28 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#29 0x00007fdab17dfbbe in g_main_dispatch (context=0x1ed8120) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:1960
#30 IA__g_main_context_dispatch (context=0x1ed8120) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2513
#31 0x00007fdab17e3588 in g_main_context_iterate (context=0x1ed8120, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2591
#32 0x00007fdab17e36b0 in IA__g_main_context_iteration (context=0x1ed8120, may_block=1) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2654
#33 0x00007fdab5cea1a6 in QEventDispatcherGlib::processEvents (this=0x1eb0d20, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#34 0x00007fdab61e94be in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#35 0x00007fdab5cc0532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#36 0x00007fdab5cc0904 in QEventLoop::exec (this=0x7fff8232b690, flags=) at kernel/qeventloop.cpp:201
#37 0x00007fdab5cc2ab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#38 0x0000000000439555 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../../apps/dolphin/src/main.cpp:94

Reported using DrKonqi