Version:            (using KDE 4.1.1)
OS:                Linux
Installed from:    Ubuntu Packages

This is very simple to reproduce, but it could depend on how the packages were built, as I read in another bug report:

-Open dolphin/konqueror in the home folder, select column view mode, press f5 for refresh and here is the backtrace:

Application: Dolphin (dolphin), signal SIGABRT
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0xb5f14720 (LWP 15547)]
[KCrash handler]
#6  0xb7f1f410 in __kernel_vsyscall ()
#7  0xb676d085 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0xb676ea01 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0xb7572367 in qt_message_output (msgType=QtFatalMsg, 
    buf=0xbf865cdc "ASSERT: \"listers.isEmpty() || killed\" in file /build/buildd/kde4libs-4.1.1+really4.1.1/kio/kio/kdirlister.cpp, line 581")
    at global/qglobal.cpp:2061
#10 0xb7572458 in qFatal (msg=0xb76b9498 "ASSERT: \"%s\" in file %s, line %d")
    at global/qglobal.cpp:2263
#11 0xb7572505 in qt_assert (
    assertion=0xb7e5e67b "listers.isEmpty() || killed", 
    file=0xb7e5eb18 "/build/buildd/kde4libs-4.1.1+really4.1.1/kio/kio/kdirlister.cpp", line=581) at global/qglobal.cpp:1831
#12 0xb7d3c515 in KDirListerCache::updateDirectory (this=0x820ee20, 
    _dir=@0x8617cd0)
    at /build/buildd/kde4libs-4.1.1+really4.1.1/kio/kio/kdirlister.cpp:581
#13 0xb7d42b02 in KDirListerCache::emitItemsFromCache (this=0x820ee20, 
    lister=0x833eb38, items=@0x8617cd8, rootItem=@0x8617cdc, _url=@0x8617cd0, 
    _reload=true, _emitCompleted=true)
    at /build/buildd/kde4libs-4.1.1+really4.1.1/kio/kio/kdirlister.cpp:289
#14 0xb7d42bcb in KDirLister::Private::CachedItemsJob::done (this=0x8617cc0)
    at /build/buildd/kde4libs-4.1.1+really4.1.1/kio/kio/kdirlister.cpp:251
#15 0xb7d42c33 in KDirLister::Private::CachedItemsJob::qt_metacall (
    this=0x8617cc0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x860f210)
    at /build/buildd/kde4libs-4.1.1+really4.1.1/obj-i486-linux-gnu/kio/kdirlister_p.moc:154
#16 0xb76748ab in QMetaCallEvent::placeMetaCall (this=0x84e1f38, 
    object=0x8617cc0) at kernel/qobject.cpp:535
#17 0xb7675c31 in QObject::event (this=0x8617cc0, e=0x84e1f38)
    at kernel/qobject.cpp:1140
#18 0xb6be4f9c in QApplicationPrivate::notify_helper (this=0x80b9360, 
    receiver=0x8617cc0, e=0x84e1f38) at kernel/qapplication.cpp:3800
#19 0xb6be9bf9 in QApplication::notify (this=0xbf86867c, receiver=0x8617cc0, 
    e=0x84e1f38) at kernel/qapplication.cpp:3392
#20 0xb7af41c3 in KApplication::notify (this=0xbf86867c, receiver=0x8617cc0, 
    event=0x84e1f38)
    at /build/buildd/kde4libs-4.1.1+really4.1.1/kdeui/kernel/kapplication.cpp:311
#21 0xb76660b9 in QCoreApplication::notifyInternal (this=0xbf86867c, 
    receiver=0x8617cc0, event=0x84e1f38) at kernel/qcoreapplication.cpp:591
#22 0xb7667469 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, 
    event_type=0, data=0x80a46b0)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#23 0xb766768d in QCoreApplication::sendPostedEvents (receiver=0x0, 
    event_type=0) at kernel/qcoreapplication.cpp:1095
#24 0xb769162f in postEventSourceDispatch (s=0x80bb370)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#25 0xb62b2dd6 in IA__g_main_context_dispatch (context=0x80bb2f0)
    at /build/buildd/glib2.0-2.16.4/glib/gmain.c:2012
#26 0xb62b6193 in g_main_context_iterate (context=0x80bb2f0, block=1, 
    dispatch=1, self=0x80b9070)
    at /build/buildd/glib2.0-2.16.4/glib/gmain.c:2645
#27 0xb62b674e in IA__g_main_context_iteration (context=0x80bb2f0, 
    may_block=1) at /build/buildd/glib2.0-2.16.4/glib/gmain.c:2708
#28 0xb76919f8 in QEventDispatcherGlib::processEvents (this=0x80b9418, 
    flags=@0xbf868568) at kernel/qeventdispatcher_glib.cpp:325
#29 0xb6c78a25 in QGuiEventDispatcherGlib::processEvents (this=0x80b9418, 
    flags=@0xbf868598) at kernel/qguieventdispatcher_glib.cpp:204
#30 0xb766533d in QEventLoop::processEvents (this=0xbf868610, 
    flags=@0xbf8685d4) at kernel/qeventloop.cpp:149
#31 0xb76654cd in QEventLoop::exec (this=0xbf868610, flags=@0xbf868618)
    at kernel/qeventloop.cpp:200
#32 0xb766774d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:849
#33 0xb6be4897 in QApplication::exec () at kernel/qapplication.cpp:3330
#34 0x08080a59 in ?? ()
#35 0xb6758450 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#36 0x080619b1 in _start ()
#0  0xb7f1f410 in __kernel_vsyscall ()