Version:            (using KDE KDE 3.5.4)
Installed from:    Debian testing/unstable Packages

Visiting e.g. http://prdownloads.sourceforge.net/wikipedia/mediawiki-1.7.1.tar.gz?download and selecting a mirror, then impatiently klicking on the "If it does not, try"-URL, going to the save-dialog crashes konqueror, because about then the auto-download kicks in and shows me another dialogue.
Then canceling this 2nd. dialogue and trying to save the file in the 1st produces the crash, with a hanging download-progress-bar still arround.
Also works with a clean ~/.kde

This is quite similar to the old/ancient SOLVED bugs
http://bugs.kde.org/show_bug.cgi?id=48792 and 
http://bugs.kde.org/show_bug.cgi?id=52845 so it looks like a regression bug.
http://bugs.kde.org/show_bug.cgi?id=94976 as well

Backtrace from KCrash looks different though:
(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(no debugging symbols found)
[...]
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1223719232 (LWP 18148)]
(no debugging symbols found)
[...]
(no debugging symbols found)
[KCrash handler]
#6  0x470fb869 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#7  0x470fba76 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#8  0xb74875be in KApplication::notify () from /usr/lib/libkdecore.so.4
#9  0x4708d001 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#10 0x470ed305 in QEventLoop::activateTimers () from /usr/lib/libqt-mt.so.3
#11 0x470a0d2a in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#12 0x47114255 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#13 0x4711417a in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#14 0x470fa38d in QApplication::exec () from /usr/lib/libqt-mt.so.3
#15 0xb7f95fe5 in kdemain () from /usr/lib/libkdeinit_konqueror.so
#16 0x08048482 in ?? ()
#17 0x00000001 in ?? ()
#18 0xbfe07794 in ?? ()
#19 0xbfe07718 in ?? ()
#20 0x080484f9 in ?? ()
#21 0xb7dd4ff4 in ?? () from /lib/tls/i686/cmov/libc.so.6
#22 0xbfe07720 in ?? ()
#23 0xbfe07768 in ?? ()
#24 0xb7cb5eb0 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#25 0xb7cb5eb0 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#26 0x080483d1 in ?? ()