Version:            (using KDE Devel)
Installed from:    Compiled sources
Compiler:          gcc 3.3 
OS:          Linux

When Konqueror closes a tab either automatically (i.e. a webpage closes it in code), or when pressing Ctrl+W, it crashes with a SIGSEGV.  Here's the backtrace (though it probably won't be very useful...):

[New Thread 1024 (LWP 28740)]
0x4c206e79 in wait4 () from /lib/libc.so.6
#0  0x4c206e79 in wait4 () from /lib/libc.so.6
#1  0x4c28aeac in __DTOR_END__ () from /lib/libc.so.6
#2  0x00f87ccf in waitpid () from /lib/libpthread.so.0
#3  0x007ed8fb in KCrash::defaultCrashHandler(int) (sig=67) at kcrash.cpp:235
#4  <signal handler called>
#5  0x00ab67d7 in QApplication::notify(QObject*, QEvent*) ()
   from /usr/src/kde-cvs//qt-copy/lib/libqt-mt.so.3
#6  0x007820b8 in KApplication::notify(QObject*, QEvent*) (this=0xfffffe00, 
    receiver=0xbb0db358, event=0xbb0db9d0) at kapplication.cpp:421