Version:            (using Devel)
Installed from:    Compiled sources
Compiler:          g++ (GCC) 4.2.3 (Ubuntu 4.2.3-2ubuntu7) 
OS:                Linux

Qt: 4.4.0
KDE: 4.1.60 (KDE 4.1.60 (KDE 4.2 >= 20080709))

KDE compiled today from SVN

As soon as I click on Preview dolphin crashes when "View Mode" Columns is activated.

Steps to reproduce:
	1. Open Dolphin
	2. Activate Columns
	3. Click on Preview

Backtrace:

Application: Dolphin (dolphin), signal SIGABRT

Thread 1 (Thread 0xb5ffc720 (LWP 20973)):
[KCrash Handler]
#6  0xb7fb3410 in __kernel_vsyscall ()
#7  0xb6398085 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0xb6399a01 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0xb73ed895 in qt_message_output (msgType=QtFatalMsg, buf=0xbfa13f40 "ASSERT: \"listers.isEmpty() || killed\" in file /home/kpatrick/kde/src/KDE/kdelibs/kio/kio/kdirlister.cpp, line 581")
    at /home/kpatrick/kde/src/qt-copy/src/corelib/global/qglobal.cpp:2058
#10 0xb73ed919 in qFatal (msg=0xb7544104 "ASSERT: \"%s\" in file %s, line %d") at /home/kpatrick/kde/src/qt-copy/src/corelib/global/qglobal.cpp:2260
#11 0xb73edd71 in qt_assert (assertion=0xb7ee6985 "listers.isEmpty() || killed", file=0xb7ee6574 "/home/kpatrick/kde/src/KDE/kdelibs/kio/kio/kdirlister.cpp", line=581)
    at /home/kpatrick/kde/src/qt-copy/src/corelib/global/qglobal.cpp:1828
#12 0xb7db7cb8 in KDirListerCache::updateDirectory (this=0x81b9338, _dir=@0x81edae8) at /home/kpatrick/kde/src/KDE/kdelibs/kio/kio/kdirlister.cpp:581
#13 0xb7dbeb2f in KDirListerCache::emitItemsFromCache (this=0x81b9338, lister=0x81e5860, items=@0x81edaf0, rootItem=@0x81edaf4, _url=@0x81edae8, _reload=true, _emitCompleted=true)
    at /home/kpatrick/kde/src/KDE/kdelibs/kio/kio/kdirlister.cpp:289
#14 0xb7dbebc6 in KDirLister::Private::CachedItemsJob::done (this=0x81edad8) at /home/kpatrick/kde/src/KDE/kdelibs/kio/kio/kdirlister.cpp:251
#15 0xb7dbec37 in KDirLister::Private::CachedItemsJob::qt_metacall (this=0x81edad8, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x81fed30)
    at /home/kpatrick/kde/build/KDE/kdelibs/kio/kdirlister_p.moc:154
#16 0xb74fb4ee in QMetaCallEvent::placeMetaCall (this=0x829e588, object=0x81edad8) at /home/kpatrick/kde/src/qt-copy/src/corelib/kernel/qobject.cpp:535
#17 0xb74ff860 in QObject::event (this=0x81edad8, e=0x829e588) at /home/kpatrick/kde/src/qt-copy/src/corelib/kernel/qobject.cpp:1137
#18 0xb689b52d in QApplicationPrivate::notify_helper (this=0x80c1ca8, receiver=0x81edad8, e=0x829e588) at /home/kpatrick/kde/src/qt-copy/src/gui/kernel/qapplication.cpp:3772
#19 0xb689b813 in QApplication::notify (this=0xbfa168ec, receiver=0x81edad8, e=0x829e588) at /home/kpatrick/kde/src/qt-copy/src/gui/kernel/qapplication.cpp:3366
#20 0xb7b4c7cd in KApplication::notify (this=0xbfa168ec, receiver=0x81edad8, event=0x829e588) at /home/kpatrick/kde/src/KDE/kdelibs/kdeui/kernel/kapplication.cpp:311
#21 0xb74ec68a in QCoreApplication::notifyInternal (this=0xbfa168ec, receiver=0x81edad8, event=0x829e588) at /home/kpatrick/kde/src/qt-copy/src/corelib/kernel/qcoreapplication.cpp:583
#22 0xb74f01c9 in QCoreApplication::sendEvent (receiver=0x81edad8, event=0x829e588) at ../../include/QtCore/../../../../src/qt-copy/src/corelib/kernel/qcoreapplication.h:215
#23 0xb74ecba2 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x80aacc0) at /home/kpatrick/kde/src/qt-copy/src/corelib/kernel/qcoreapplication.cpp:1195
#24 0xb74ecd53 in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at /home/kpatrick/kde/src/qt-copy/src/corelib/kernel/qcoreapplication.cpp:1091
#25 0xb751d5a2 in QCoreApplication::sendPostedEvents () at ../../include/QtCore/../../../../src/qt-copy/src/corelib/kernel/qcoreapplication.h:220
#26 0xb751c7b3 in postEventSourceDispatch (s=0x80c3978) at /home/kpatrick/kde/src/qt-copy/src/corelib/kernel/qeventdispatcher_glib.cpp:211
#27 0xb6218bf8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#28 0xb621be5e in ?? () from /usr/lib/libglib-2.0.so.0
#29 0xb621c3ac in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#30 0xb751bbcc in QEventDispatcherGlib::processEvents (this=0x80bc740, flags=@0xbfa167d4) at /home/kpatrick/kde/src/qt-copy/src/corelib/kernel/qeventdispatcher_glib.cpp:325
#31 0xb6943428 in QGuiEventDispatcherGlib::processEvents (this=0x80bc740, flags=@0xbfa16804) at /home/kpatrick/kde/src/qt-copy/src/gui/kernel/qguieventdispatcher_glib.cpp:204
#32 0xb74e954a in QEventLoop::processEvents (this=0xbfa16880, flags=@0xbfa16844) at /home/kpatrick/kde/src/qt-copy/src/corelib/kernel/qeventloop.cpp:149
#33 0xb74e9789 in QEventLoop::exec (this=0xbfa16880, flags=@0xbfa16888) at /home/kpatrick/kde/src/qt-copy/src/corelib/kernel/qeventloop.cpp:196
#34 0xb74ece73 in QCoreApplication::exec () at /home/kpatrick/kde/src/qt-copy/src/corelib/kernel/qcoreapplication.cpp:845
#35 0xb689b246 in QApplication::exec () at /home/kpatrick/kde/src/qt-copy/src/gui/kernel/qapplication.cpp:3304
#36 0x0808458d in main (argc=6, argv=0xbfa16aa4) at /home/kpatrick/kde/src/KDE/kdebase/apps/dolphin/src/main.cpp:94