Version:           3.5.4 (using KDE KDE 3.5.4)
Installed from:    Debian testing/unstable Packages
Compiler:          gcc (GCC) 4.1.2 20060901 (prerelease) (Debian 4.1.1-13) 
OS:                Linux

Konqueror crashes frequently when browsing on every protocol. I am unable to describe how to reproduce the crash, it just happens unexpectedly.
Backtrace follows:

Using host libthread_db library "/lib/tls/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1232611648 (LWP 12902)]
[KCrash handler]
#5  0xb716268b in QPixmap::convertToImage () from /usr/lib/libqt-mt.so.3
#6  0xb77d2fb8 in KWin::setIcons (win=58720261, icon=@0xbf90bae4, 
    miniIcon=@0xbf90ba24)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kdecore/kwin.cpp:507
#7  0xb6c66f3d in KMainWindow::setIcon (this=0x81facd0, p=@0xbf90bae4)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kdeui/kmainwindow.cpp:1231
#8  0xb6783706 in KonqMainWindow::setIcon (this=0x81facd0, pix=@0xbf90bae4)
    at /home/sid-user/kdebase/kdebase-3.5.4/./konqueror/konq_mainwindow.cc:5250
#9  0xb678ffc2 in KonqMainWindow::setLocationBarURL (this=0x81facd0, 
    url=@0x8d1262c)
    at /home/sid-user/kdebase/kdebase-3.5.4/./konqueror/konq_mainwindow.cc:3597
#10 0xb67900e3 in KonqView::setLocationBarURL (this=0x8d12600, 
    locationBarURL=@0xbf90bb98)
    at /home/sid-user/kdebase/kdebase-3.5.4/./konqueror/konq_view.cc:644
#11 0xb67ac32b in KonqViewManager::setActivePart (this=0x8201778, part=0x0, 
    immediate=true)
    at /home/sid-user/kdebase/kdebase-3.5.4/./konqueror/konq_viewmgr.cc:1351
#12 0xb67ac57e in KonqViewManager::clear (this=0x8201778)
    at /home/sid-user/kdebase/kdebase-3.5.4/./konqueror/konq_viewmgr.cc:915
#13 0xb67ac771 in KonqMainWindow::stayPreloaded (this=0x81facd0)
    at /home/sid-user/kdebase/kdebase-3.5.4/./konqueror/konq_mainwindow.cc:5727
#14 0xb67acbd6 in KonqMainWindow::queryExit (this=0x81facd0)
    at /home/sid-user/kdebase/kdebase-3.5.4/./konqueror/konq_mainwindow.cc:5245
#15 0xb6c3f7a0 in KMainWindow::shuttingDown (this=0x0)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kdeui/kmainwindow.cpp:1104
#16 0xb6d8baa1 in KMainWindow::qt_invoke (this=0x81facd0, _id=72, 
    _o=0xbf90be2c) at ./kmainwindow.moc:139
#17 0xb7edbbd3 in KParts::MainWindow::qt_invoke (this=0x81facd0, _id=72, 
    _o=0xbf90be2c) at ./mainwindow.moc:98
#18 0xb67cc423 in KonqMainWindow::qt_invoke (this=0x81facd0, _id=72, 
    _o=0xbf90be2c) at ./konq_mainwindow.moc:732
#19 0xb7216b87 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#20 0xb7217618 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#21 0xb77b9ccc in KApplication::shutDown (this=0xbf90c62c)
    at ./kapplication.moc:232
#22 0xb77b9d9e in KApplication::xioErrhandler (this=0xbf90c62c, dpy=0x806bbe0)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kdecore/kapplication.cpp:726
#23 0xb77b9df9 in kde_xio_errhandler (dpy=0x806bbe0)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kdecore/kapplication.cpp:179
#24 0xb6e8990d in _XIOError () from /usr/lib/libX11.so.6
#25 0xb6e8b1e6 in _XSend () from /usr/lib/libX11.so.6
#26 0xb6e6128a in XCheckTypedWindowEvent () from /usr/lib/libX11.so.6
#27 0xb713213b in QETWidget::translateConfigEvent ()
   from /usr/lib/libqt-mt.so.3
#28 0xb713f715 in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#29 0xb7155cb2 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#30 0xb71c903d in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#31 0xb71c8e5e in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#32 0xb71b0683 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#33 0xb67c8fe5 in kdemain (argc=2, argv=0x80e2188)
    at /home/sid-user/kdebase/kdebase-3.5.4/./konqueror/konq_main.cc:206
#34 0xb7eed524 in kdeinitmain (argc=2, argv=0x80e2188) at konqueror_dummy.cc:3
#35 0x0804e9d7 in launch (argc=2, _name=0x80fdb0c "konqueror", 
    args=0x80fdb1e "", cwd=0x0, envc=1, envs=0x80fdb2f "", reset_env=false, 
    tty=0x0, avoid_loops=false, 
    startup_id_str=0x80fdb34 "morty;1157388897;712695;15952_TIME2042694978")
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kinit/kinit.cpp:639
#36 0x0804f279 in handle_launcher_request (sock=8)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kinit/kinit.cpp:1206
#37 0x0804f612 in handle_requests (waitForPid=0)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kinit/kinit.cpp:1407
#38 0x08050019 in main (argc=3, argv=0xbf90d0d4, envp=0xbf90d0e4)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kinit/kinit.cpp:1863
#39 0xb7c77ea8 in __libc_start_main () from /lib/tls/libc.so.6
#40 0x0804b8a1 in _start () at ../sysdeps/i386/elf/start.S:119