This time it happened when closing kcontrol -- The application unknown
(kcontrol) crashed and caused the signal 11 (SIGSEGV)

backtrace:

[New Thread 1024 (LWP 9432)]
0x413c13b9 in wait4 () from /lib/libc.so.6
#0  0x413c13b9 in wait4 () from /lib/libc.so.6
#1  0x4143930c in __DTOR_END__ () from /lib/libc.so.6
#2  0x4126183a in waitpid () from /lib/libpthread.so.0
#3  0x406c415c in KCrash::defaultCrashHandler ()
   from /usr/local/apps/kde-3.1cvs/lib/libkdecore.so.4
#4  0x4125f307 in pthread_sighandler () from /lib/libpthread.so.0
#5  <signal handler called>
#6  0x41aa3ab4 in ?? ()
#7  0x0804d12d in launch ()
#8  0x0804df68 in handle_launcher_request ()
#9  0x0804e50b in handle_requests ()
#10 0x0804f6ef in main ()
#11 0x4132e0c4 in __libc_start_main () from /lib/libc.so.6

(Complete bug history is available at http://bugs.kde.org/db/43/43288.html)