Version:           3.4.0 (using KDE 3.4.89 (>= 20050508), compiled sources)
Compiler:          gcc version 3.3.5 20050117 (prerelease) (SUSE Linux)
OS:                Linux (i686) release 2.6.11ac7-default

Running an endless javascript, konqueror crashed when it was aborted. I cant reproduce it, but I hope the backtrace is helpful.

Using host libthread_db library "/lib/tls/libthread_db.so.1".
[KCrash handler]
#7  0x40088cda in QGuardedPtr<KonqMainWindow>::operator= (
    this=<value optimized out>, o=0x0) at qguardedptr.h:94
#8  0x400881e1 in KonqRun::foundMimeType (this=0x820a400, _type=@0xe9020970)
    at /data/kdesvn/kdesvn/kdebase/konqueror/konq_run.cc:94
#9  0x401de3fd in KParts::BrowserRun::slotBrowserMimetype (this=0x820a400, 
    _job=0x8a536d8, type=@0x8a3e368)
    at /data/kdesvn/kdesvn/kdelibs/kparts/browserrun.cpp:196
#10 0x401e0447 in KParts::BrowserRun::qt_invoke (this=0x820a400, _id=7, 
    _o=0xbfffe5d0) at browserrun.moc:102
#11 0x400889a0 in KonqRun::qt_invoke (this=0x820a400, _id=7, _o=0xbfffe5d0)
    at konq_run.moc:88
#12 0x40e7db6d in QObject::activate_signal (this=0x8a536d8, clist=0x8559bf8, 
    o=0xbfffe5d0) at qconnection.h:54
#13 0x403d7c25 in KIO::TransferJob::mimetype (this=0x8a536d8, t0=0xe9020970, 
    t1=@0xe9020970) at jobclasses.moc:1029
#14 0x403c6660 in KIO::TransferJob::slotMimetype (this=0x8a536d8, 
    type=@0xe9020970) at /data/kdesvn/kdesvn/kdelibs/kio/kio/job.cpp:1056
#15 0x403d7e0e in KIO::TransferJob::qt_invoke (this=0x8a536d8, _id=20, 
    _o=0xbfffe6f0) at jobclasses.moc:1053
#16 0x40e7db6d in QObject::activate_signal (this=0x84e7310, clist=0x87d9870, 
    o=0xbfffe6f0) at qconnection.h:54
#17 0x40e7e10b in QObject::activate_signal (this=0x84e7310, signal=19, param=
      {static null = {static null = <same as static member of an already seen type>, d = 0x804c070, static shared_null = 0x804c070}, d = 0x843da30, static shared_null = 0x804c070}) at qobject.cpp:2450
#18 0x403b6c72 in KIO::SlaveInterface::mimeType (this=0xe9020970, 
    t0=@0xe9020970) at slaveinterface.moc:370
#19 0x403b5027 in KIO::SlaveInterface::dispatch (this=0x84e7310, _cmd=21, 
    rawdata=@0xbfffe8c0)
    at /data/kdesvn/kdesvn/kdelibs/kio/kio/slaveinterface.cpp:338
#20 0x403b4908 in KIO::SlaveInterface::dispatch (this=0x84e7310)
    at /data/kdesvn/kdesvn/kdelibs/kio/kio/slaveinterface.cpp:173
#21 0x403b25b5 in KIO::Slave::gotInput (this=0x84e7310)
    at /data/kdesvn/kdesvn/kdelibs/kio/kio/slave.cpp:300
#22 0x403b3f02 in KIO::Slave::qt_invoke (this=0x84e7310, _id=4, _o=0xbfffea00)
    at slave.moc:113
#23 0x40e7db6d in QObject::activate_signal (this=0x8657b68, clist=0x820ffa8, 
    o=0xbfffea00) at qconnection.h:54
#24 0x40e7ddd1 in QObject::activate_signal (this=0x8657b68, signal=2, param=23)
    at qobject.cpp:2448
#25 0x41187f54 in QSocketNotifier::activated (this=0xe9020970, t0=-385742480)
    at qmetaobject.h:261
#26 0x40e98c81 in QSocketNotifier::event (this=0x8657b68, e=0xbfffed10)
    at qsocketnotifier.cpp:258
#27 0x40e249d9 in QApplication::internalNotify (this=0xbffff150, 
    receiver=0x8657b68, e=0xbfffed10) at qapplication.cpp:2635
#28 0x40e2479a in QApplication::notify (this=0xbffff150, receiver=0x8657b68, 
    e=0xbfffed10) at qapplication.cpp:2523
#29 0x40981b5e in KApplication::notify (this=0xbffff150, receiver=0x8657b68, 
    event=0xbfffed10)
    at /data/kdesvn/kdesvn/kdelibs/kdecore/kapplication.cpp:549
#30 0x40e15292 in QEventLoop::activateSocketNotifiers (this=0x80d0418)
    at qapplication.h:491
#31 0x40dd1b7c in QEventLoop::processEvents (this=0x80d0418, flags=4)
    at qeventloop_x11.cpp:383
#32 0x40e35b25 in QEventLoop::enterLoop (this=0x80d0418) at qeventloop.cpp:198
#33 0x40e35a7c in QEventLoop::exec (this=0x80d0418) at qeventloop.cpp:145
#34 0x40e24b37 in QApplication::exec (this=0xbffff150) at qapplication.cpp:2758
#35 0x4007c32b in kdemain (argc=-385742480, argv=0xe9020970)
    at /data/kdesvn/kdesvn/kdebase/konqueror/konq_main.cc:206
#36 0x0804871a in main (argc=-385742480, argv=0xe9020970) at konqueror.la.cc:2