Version:           4.0 (using KDE 3.1.2)
Installed from:    compiled sources
Compiler:          gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-98)
OS:          Linux (i686) release 2.4.17

I had a crash in konqi, but I'm sorry to say that I have no idea how to reproduce it.
Nevertheless, maybe a simple look inside the code shows where the problem lies. Here is the dump:

[New Thread 1024 (LWP 7549)]
0x41038669 in __wait4 () from /lib/i686/libc.so.6
#0  0x41038669 in __wait4 () from /lib/i686/libc.so.6
#1  0x410b4154 in __DTOR_END__ () from /lib/i686/libc.so.6
#2  0x40ef8523 in waitpid (pid=7682, stat_loc=0x0, options=0)
    at wrapsyscall.c:172
#3  0x405ad4d8 in KCrash::defaultCrashHandler (sig=11) at kcrash.cpp:235
#4  0x40ef68d5 in pthread_sighandler (signo=11, ctx=
      {gs = 7, __gsh = 0, fs = 0, __fsh = 0, es = 43, __esh = 0, ds = 43, __dsh = 0, edi = 3221218224, esi = 3221218160, ebp = 3221218280, esp = 3221217632, ebx = 1078656156, edx = 0, ecx = 3, eax = 0, trapno = 14, err = 4, eip = 1078111850, cs = 35, __csh = 0, eflags = 66118, esp_at_signal = 3221217632, ss = 43, __ssh = 0, fpstate = 0xbfffdee0, oldmask = 2147483648, cr2 = 40}) at signals.c:97
#5  <signal handler called>
#6  0x4042ae6a in KXMLGUIFactory::removeClient (this=0x0, client=0x83509e8)
    at /opt/qt3.1/include/qptrlist.h:71
#7  0x42f4bbb8 in KHTMLPart::slotActiveFrameChanged (this=0x8284220, part=0x0)
    at khtml_part.cpp:4973
#8  0x42f4c95c in KHTMLPart::qt_invoke (this=0x8284220, _id=37, _o=0xbfffe560)
    at /opt/qt3.1/include/private/qucom_p.h:312
#9  0x409832bf in QObject::activate_signal (this=0x82ed6c0, clist=0x830c290, 
    o=0xbfffe560) at kernel/qobject.cpp:2226
#10 0x4003862f in KParts::PartManager::activePartChanged (this=0x82ed6c0, 
    t0=0x0) at partmanager.moc:156
#11 0x40037e28 in KParts::PartManager::setActivePart (this=0x82ed6c0, 
    part=0x0, widget=0x0) at partmanager.cpp:444
#12 0x42f3091a in KHTMLPart::~KHTMLPart (this=0xc3, __in_chrg=3)
    at khtml_part.cpp:271
#13 0x412c4e64 in KonqView::~KonqView (this=0x8283938, __in_chrg=3)
    at konq_view.cc:119
#14 0x412d0b9d in KonqViewManager::clear (this=0x812c288)
    at /opt/qt3.1/include/qptrlist.h:143
#15 0x412ca9ce in KonqViewManager::~KonqViewManager (this=0x812c288, 
    __in_chrg=3) at konq_viewmgr.cc:70
#16 0x412a0d22 in KonqMainWindow::~KonqMainWindow (this=0x8127cc8, __in_chrg=3)
    at konq_mainwindow.cc:232
#17 0x40980e07 in QObject::event (this=0x8127cc8, e=0x8437f70)
    at kernel/qobject.cpp:683
#18 0x409b0e5e in QWidget::event (this=0x8127cc8, e=0x8437f70)
    at kernel/qwidget.cpp:4353
#19 0x40a49573 in QMainWindow::event (this=0x8127cc8, e=0x8437f70)
    at widgets/qmainwindow.cpp:1668
#20 0x40934f40 in QApplication::internalNotify (this=0xbffff3a0, 
    receiver=0x8127cc8, e=0x8437f70) at kernel/qapplication.cpp:2418
#21 0x40934a25 in QApplication::notify (this=0xbffff3a0, receiver=0x8127cc8, 
    e=0x8437f70) at kernel/qapplication.cpp:2311
#22 0x4053814e in KApplication::notify (this=0xbffff3a0, receiver=0x8127cc8, 
    event=0x8437f70) at kapplication.cpp:455
#23 0x40c5f0ca in QApplication::sendEvent (receiver=0x8127cc8, event=0x8437f70)
    at kernel/qapplication.h:480
#24 0x40935f56 in QApplication::sendPostedEvents (receiver=0x0, event_type=52)
    at kernel/qapplication.cpp:3039
#25 0x40947066 in QEventLoop::enterLoop (this=0x80b03c8)
    at kernel/qeventloop.cpp:213
#26 0x40946ec4 in QEventLoop::exec (this=0x80b03c8)
    at kernel/qeventloop.cpp:145
#27 0x409350db in QApplication::exec (this=0xbffff3a0)
    at kernel/qapplication.cpp:2541
#28 0x4129e535 in main (argc=4, argv=0x805cde0) at konq_main.cc:131
#29 0x0804cb2c in launch (argc=4, _name=0x805ce0c "konqueror", 
    args=0x805ce68 "/root", cwd=0x805ce68 "/root", envc=31, envs=0x805d1c5 "", 
    reset_env=true, tty=0x0, avoid_loops=false, 
    startup_id_str=0x805d1c9 "eiwnt048;1059048311;879913;9339")
    at kinit.cpp:547
#30 0x0804d873 in handle_launcher_request (sock=4) at kinit.cpp:1030
#31 0x0804dcc9 in handle_requests (waitForPid=0) at kinit.cpp:1186
#32 0x0804ec33 in main (argc=3, argv=0xbffffc14, envp=0xbffffc24)
    at kinit.cpp:1547
#33 0x40f9a507 in __libc_start_main (main=0x804e650 <main>, argc=3, 
    ubp_av=0xbffffc14, init=0x804a8c8 <_init>, fini=0x804f364 <_fini>, 
    rtld_fini=0x4000dc14 <_dl_fini>, stack_end=0xbffffc0c)
    at ../sysdeps/generic/libc-start.c:129