Version:            (using KDE KDE 3.4.92)
Installed from:    Unspecified Linux
Compiler:          g++ 3.4.2 
OS:                Linux

After I checked my email in yahoo, I closed Konqueror and it crashed. Here is the backtrace:
Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 32729)]
[KCrash handler]
#4  0x417772a1 in __kill () from /lib/libc.so.6
#5  0x415ed831 in pthread_kill (thread=32729, signo=0) at signals.c:65
#6  0x415edb3b in __pthread_raise (sig=1096760320) at signals.c:187
#7  0x41776ee4 in *__GI_raise (sig=6)
    at ../linuxthreads/sysdeps/unix/sysv/linux/raise.c:34
#8  0x41778698 in *__GI_abort () at ../sysdeps/generic/abort.c:88
#9  0x4177052c in *__GI___assert_fail (assertion=0x0, file=0x0, line=0, 
    function=0x429b35c0 "static void khtml::Cache::clear()") at assert.c:83
#10 0x428bda2a in khtml::Cache::clear () from /mnt/Dandy/lib/libkhtml.so.4
#11 0x4274a76c in KHTMLFactory::~KHTMLFactory ()
   from /mnt/Dandy/lib/libkhtml.so.4
#12 0x42738a88 in KHTMLFactory::deref () from /mnt/Dandy/lib/libkhtml.so.4
#13 0x4274a677 in KHTMLFactory::~KHTMLFactory ()
   from /mnt/Dandy/lib/libkhtml.so.4
#14 0x40ad4d1c in KLibrary::~KLibrary () from /mnt/Dandy/lib/libkdecore.so.4
#15 0x40a2a2e7 in KLibLoader::close_pending ()
   from /mnt/Dandy/lib/libkdecore.so.4
#16 0x40ad3fe4 in KLibLoader::~KLibLoader ()
   from /mnt/Dandy/lib/libkdecore.so.4
#17 0x409e3758 in KLibLoader::cleanUp () from /mnt/Dandy/lib/libkdecore.so.4
#18 0x40ab6523 in KApplication::~KApplication ()
   from /mnt/Dandy/lib/libkdecore.so.4
#19 0x400d94f8 in kdemain () from /mnt/Dandy/lib/libkdeinit_konqueror.so
#20 0x0804868e in main ()