Version:           4.00.61 (KDE 4.0.61 >= 20080207) (using 4.00.61 (KDE 4.0.61 >= 20080207), Gentoo)
Compiler:          i686-pc-linux-gnu-gcc
OS:                Linux (i686) release 2.6.23-gentoo-r6

What I did: 
- I used konqueror as a filebrowser and had several folders open. 
- I switched to a console to created a new file (touch foo.php) in one of the folders konqueror was displaying. (This was the first *.php file in that folder)
- As soon as I hit enter to create that file, konqueror (kdelibs r772899) crashed with the backtrace below.

Regrettably, I have not found a way to reproduce this crash so far.

Application: Konqueror (konqueror), signal SIGABRT
Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb6434a10 (LWP 8440)]
[New Thread 0xb21c4b90 (LWP 9578)]
[KCrash handler]
#6  0xffffe410 in __kernel_vsyscall ()
#7  0xb66601f1 in *__GI_raise (sig=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#8  0xb66619b8 in *__GI_abort () at abort.c:88
#9  0xb726c265 in qt_message_output (msgType=QtFatalMsg, 
    buf=0xbf8d9abc "ASSERT: \"result.second\" in file /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/kdirmodel.cpp, line 304")
    at global/qglobal.cpp:2160
#10 0xb726c32a in qFatal (msg=0xb737387c "ASSERT: \"%s\" in file %s, line %d")
    at global/qglobal.cpp:2392
#11 0xb726c555 in qt_assert (assertion=0xb7e6158c "result.second", 
    file=0xb7e61270 "/var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/kdirmodel.cpp", line=304) at global/qglobal.cpp:1917
#12 0xb7d45c79 in KDirModelPrivate::_k_slotNewItems (this=0x85c1da0, 
    items=@0x844f9b0)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/kdirmodel.cpp:304
#13 0xb7d46400 in KDirModel::qt_metacall (this=0x883c358, 
    _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0xbf8dc12c)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs_build/kio/kdirmodel.moc:75
#14 0xb73521f4 in QMetaObject::activate (sender=0x883d208, 
    from_signal_index=13, to_signal_index=13, argv=<value optimized out>)
    at kernel/qobject.cpp:3081
#15 0xb7352d94 in QMetaObject::activate (sender=0x883d208, m=0xb7e803bc, 
    local_signal_index=9, argv=0xbf8dc12c) at kernel/qobject.cpp:3140
#16 0xb7d2df94 in KDirLister::newItems (this=0x883d208, _t1=@0x844f9b0)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs_build/kio/kdirlister.moc:252
#17 0xb7d2e5ba in KDirLister::Private::emitItems (this=0x87de1b0)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/kdirlister.cpp:2184
#18 0xb7d383b4 in KDirListerCache::slotUpdateResult (this=0x85be6c8, 
    j=0x87afdf0)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/kdirlister.cpp:1489
#19 0xb7d38d6a in KDirListerCache::qt_metacall (this=0x85be6c8, 
    _c=QMetaObject::InvokeMetaMethod, _id=15, _a=0xbf8dc87c)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs_build/kio/kdirlister_p.moc:100
#20 0xb73521f4 in QMetaObject::activate (sender=0x87afdf0, 
    from_signal_index=7, to_signal_index=7, argv=<value optimized out>)
    at kernel/qobject.cpp:3081
#21 0xb7352d94 in QMetaObject::activate (sender=0x87afdf0, m=0xb7c593a8, 
    local_signal_index=3, argv=0xbf8dc87c) at kernel/qobject.cpp:3140
#22 0xb7b57044 in KJob::result (this=0x87afdf0, _t1=0x87afdf0)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs_build/kdecore/kjob.moc:185
#23 0xb7b57582 in KJob::emitResult (this=0x87afdf0)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kdecore/jobs/kjob.cpp:290
#24 0xb7d10298 in KIO::SimpleJob::slotFinished (this=0x87afdf0)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/job.cpp:491
#25 0xb7d1049b in KIO::ListJob::slotFinished (this=0x87afdf0)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/job.cpp:2358
#26 0xb7d1542c in KIO::ListJob::qt_metacall (this=0x87afdf0, 
    _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbf8dcea4)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs_build/kio/jobclasses.moc:746
#27 0xb73521f4 in QMetaObject::activate (sender=0x884dc18, 
    from_signal_index=8, to_signal_index=8, argv=<value optimized out>)
    at kernel/qobject.cpp:3081
#28 0xb7352d94 in QMetaObject::activate (sender=0x884dc18, m=0xb7e82024, 
    local_signal_index=4, argv=0x0) at kernel/qobject.cpp:3140
#29 0xb7db8b56 in KIO::SlaveInterface::finished (this=0x884dc18)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs_build/kio/slaveinterface.moc:160
#30 0xb7dba71a in KIO::SlaveInterface::dispatch (this=0x884dc18, _cmd=104, 
    rawdata=@0xbf8dd084)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/slaveinterface.cpp:176
#31 0xb7dbb376 in KIO::SlaveInterface::dispatch (this=0x884dc18)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/slaveinterface.cpp:90
#32 0xb7dad9e7 in KIO::Slave::gotInput (this=0x884dc18)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/slave.cpp:319
#33 0xb7daef3d in KIO::Slave::qt_metacall (this=0x884dc18, 
    _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbf8dd5a4)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs_build/kio/slave.moc:74
#34 0xb73521f4 in QMetaObject::activate (sender=0x8394f90, 
    from_signal_index=4, to_signal_index=4, argv=<value optimized out>)
    at kernel/qobject.cpp:3081
#35 0xb7352d94 in QMetaObject::activate (sender=0x8394f90, m=0xb7e7ef20, 
    local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3140
#36 0xb7ce8b03 in KIO::Connection::readyRead (this=0x8394f90)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs_build/kio/connection.moc:83
#37 0xb7ce9986 in KIO::ConnectionPrivate::dequeue (this=0x8411648)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kio/kio/connection.cpp:82
#38 0xb7cea735 in KIO::Connection::qt_metacall (this=0x8394f90, 
    _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x83e75f0)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs_build/kio/connection.moc:71
#39 0xb734d2f9 in QMetaCallEvent::placeMetaCall (this=0x847a750, 
    object=0x8394f90) at kernel/qobject.cpp:536
#40 0xb7350017 in QObject::event (this=0x8394f90, e=0x20f8)
    at kernel/qobject.cpp:1122
#41 0xb69dfe8a in QApplicationPrivate::notify_helper (this=0x80587d0, 
    receiver=0x8394f90, e=0x847a750) at kernel/qapplication.cpp:3556
#42 0xb69e177a in QApplication::notify (this=0xbf8ddf98, receiver=0x8394f90, 
    e=0x847a750) at kernel/qapplication.cpp:3115
#43 0xb7921763 in KApplication::notify (this=0xbf8ddf98, receiver=0x8394f90, 
    event=0x847a750)
    at /var/tmp/portage/kde-base/kdelibs-9999.4/work/kdelibs-9999.4/kdeui/kernel/kapplication.cpp:311
#44 0xb733ed7b in QCoreApplication::notifyInternal (this=0xbf8ddf98, 
    receiver=0x8394f90, event=0x847a750) at kernel/qcoreapplication.cpp:530
#45 0xb734021a in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, 
    event_type=0, data=0x804ce50) at kernel/qcoreapplication.h:200
#46 0xb734056d in QCoreApplication::sendPostedEvents (receiver=0x0, 
    event_type=0) at kernel/qcoreapplication.cpp:1001
#47 0xb6a69aee in QEventDispatcherX11::processEvents (this=0x8057f50, 
    flags=@0xbf8ddca4)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:205
#48 0xb733e191 in QEventLoop::processEvents (this=0xbf8ddd10, 
    flags=@0xbf8ddcd8) at kernel/qeventloop.cpp:140
#49 0xb733e29a in QEventLoop::exec (this=0xbf8ddd10, flags=@0xbf8ddd18)
    at kernel/qeventloop.cpp:186
#50 0xb7340626 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:759
#51 0xb69df487 in QApplication::exec () at kernel/qapplication.cpp:3053
#52 0xb7fc7657 in kdemain (argc=1, argv=0xbf8de314)
    at /var/tmp/portage/kde-base/kdebase-9999.4/work/kdebase-9999.4/apps/konqueror/src/konqmain.cpp:218
#53 0x080487e2 in main (argc=)
    at /var/tmp/portage/kde-base/kdebase-9999.4/work/kdebase_build/apps/konqueror/src/konqueror_dummy.cpp:3
#54 0xb664cfdc in __libc_start_main (main=0x80487c0 <main>, argc=1, 
    ubp_av=0xbf8de314, init=0x8048810 <__libc_csu_init>, 
    fini=0x8048800 <__libc_csu_fini>, rtld_fini=0xb7fec100 <_dl_fini>, 
    stack_end=0xbf8de30c) at libc-start.c:229
#55 0x08048731 in _start ()
#0  0xffffe410 in __kernel_vsyscall ()