Version:           3.5.7 (using KDE 3.5.7, Debian Package 4:3.5.7.dfsg.1-7 (lenny/sid))
Compiler:          Target: i486-linux-gnu
OS:                Linux (i686) release 2.6.22-2-686

I was searching for a file with a certain content and used konqueror for that task. Unfortunately the search produced much too many results and I did not see any context in the results list. So I decided to stop and switch to the command line. I closed konqueror and got a nice crash with the following backtrace:

Using host libthread_db library "/lib/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb67bc6c0 (LWP 11348)]
[KCrash handler]
#6  0xb70f0700 in QString::length (this=0x8340188) at ../include/qstring.h:880
#7  0xb74e4e88 in QString::find (this=0xbf846d60, str=@0x8340188, index=0, 
    cs=false) at tools/qstring.cpp:2916
#8  0xb56697ed in KQuery::processQuery () from /usr/lib/kde3/libkfindpart.so
#9  0xb5667f81 in KQuery::checkEntries () from /usr/lib/kde3/libkfindpart.so
#10 0xb5668085 in KQuery::slotListEntries ()
   from /usr/lib/kde3/libkfindpart.so
#11 0xb5668228 in KQuery::qt_invoke () from /usr/lib/kde3/libkfindpart.so
#12 0xb71cbb10 in QObject::activate_signal (this=0x88d34d8, clist=0x8755e40, 
    o=0xbf846ef0) at kernel/qobject.cpp:2356
#13 0xb7a2b8be in KIO::ListJob::entries (this=0x3, t0=0x88d34d8, 
    t1=@0xbf847234) at ./jobclasses.moc:1733
#14 0xb7a7b93b in KIO::ListJob::slotListEntries (this=0x88d34d8, 
    list=@0xbf847234)
    at /build/buildd/kdelibs-3.5.7.dfsg.1/./kio/kio/job.cpp:2057
#15 0xb7a7bc30 in KIO::ListJob::qt_invoke (this=0x88d34d8, _id=19, 
    _o=0xbf847074) at ./jobclasses.moc:1771
#16 0xb71cbb10 in QObject::activate_signal (this=0x8755ec0, clist=0x87561b0, 
    o=0xbf847074) at kernel/qobject.cpp:2356
#17 0xb7a2ad71 in KIO::SlaveInterface::listEntries (this=0x8755ec0, 
    t0=@0xbf847234) at ./slaveinterface.moc:255
#18 0xb7a95e3e in KIO::SlaveInterface::dispatch (this=0x8755ec0, _cmd=106, 
    rawdata=@0xbf847280)
    at /build/buildd/kdelibs-3.5.7.dfsg.1/./kio/kio/slaveinterface.cpp:263
#19 0xb7a94cba in KIO::SlaveInterface::dispatch (this=0x8755ec0)
    at /build/buildd/kdelibs-3.5.7.dfsg.1/./kio/kio/slaveinterface.cpp:173
#20 0xb7a3b1fc in KIO::Slave::gotInput (this=0x8755ec0)
    at /build/buildd/kdelibs-3.5.7.dfsg.1/./kio/kio/slave.cpp:300
#21 0xb7a84ec0 in KIO::Slave::qt_invoke (this=0x8755ec0, _id=4, _o=0xbf847380)
    at ./slave.moc:113
#22 0xb71cbb10 in QObject::activate_signal (this=0x881ffc8, clist=0x87560d8, 
    o=0xbf847380) at kernel/qobject.cpp:2356
#23 0xb71cc45d in QObject::activate_signal (this=0x881ffc8, signal=2, 
    param=26) at kernel/qobject.cpp:2449
#24 0xb755c40d in QSocketNotifier::activated (this=0x881ffc8, t0=26)
    at .moc/debug-shared-mt/moc_qsocketnotifier.cpp:85
#25 0xb71edcda in QSocketNotifier::event (this=0x881ffc8, e=0xbf8476c8)
    at kernel/qsocketnotifier.cpp:258
#26 0xb716036a in QApplication::internalNotify (this=0xbf8479bc, 
    receiver=0x881ffc8, e=0xbf8476c8) at kernel/qapplication.cpp:2635
#27 0xb7162193 in QApplication::notify (this=0xbf8479bc, receiver=0x881ffc8, 
    e=0xbf8476c8) at kernel/qapplication.cpp:2358
#28 0xb786eff2 in KApplication::notify (this=0xbf8479bc, receiver=0x881ffc8, 
    event=0xbf8476c8)
    at /build/buildd/kdelibs-3.5.7.dfsg.1/./kdecore/kapplication.cpp:550
#29 0xb70f16c9 in QApplication::sendEvent (receiver=0x881ffc8, 
    event=0xbf8476c8) at ../include/qapplication.h:520
#30 0xb71521e2 in QEventLoop::activateSocketNotifiers (this=0x80c0af8)
    at kernel/qeventloop_unix.cpp:578
#31 0xb710617f in QEventLoop::processEvents (this=0x80c0af8, flags=4)
    at kernel/qeventloop_x11.cpp:383
#32 0xb717b6e4 in QEventLoop::enterLoop (this=0x80c0af8)
    at kernel/qeventloop.cpp:198
#33 0xb717b3e2 in QEventLoop::exec (this=0x80c0af8)
    at kernel/qeventloop.cpp:145
#34 0xb7161f13 in QApplication::exec (this=0xbf8479bc)
    at kernel/qapplication.cpp:2758
#35 0xb659b544 in kdemain () from /usr/lib/libkdeinit_konqueror.so
#36 0xb7f0a454 in kdeinitmain () from /usr/lib/kde3/konqueror.so
#37 0x0804e66f in launch (argc=4, _name=0x807bb7c "konqueror", 
    args=0x807bbd0 "", cwd=0x807bbd1 "/home/ronny", envc=26, 
    envs=0x807bfb3 "", reset_env=true, tty=0x0, avoid_loops=false, 
    startup_id_str=0x807bfb8 "ronny;1193940471;30865;11314_TIME4234529125")
    at /build/buildd/kdelibs-3.5.7.dfsg.1/./kinit/kinit.cpp:673
#38 0x0804eeff in handle_launcher_request (sock=7)
    at /build/buildd/kdelibs-3.5.7.dfsg.1/./kinit/kinit.cpp:1240
#39 0x0804f41c in handle_requests (waitForPid=0)
    at /build/buildd/kdelibs-3.5.7.dfsg.1/./kinit/kinit.cpp:1433
#40 0x0805051c in main (argc=5, argv=0xbf848454, envp=0xbf84846c)
    at /build/buildd/kdelibs-3.5.7.dfsg.1/./kinit/kinit.cpp:1909
#41 0xb7c5d050 in __libc_start_main () from /lib/i686/cmov/libc.so.6
#42 0x0804bb51 in _start ()