Version:           unknown (using KDE 3.4.2 Level "b" , SUSE 10.0)
Compiler:          Target: i586-suse-linux
OS:                Linux (i686) release 2.6.13-15.8-smp

When I have KSim running, kicker crashes very often.
The backtrace does not appear to be useful - it mostly contains "no debugging symbols" lines. I've included one at the end nevertheless.

When searching for similar bugs before this submission, I found a procedure to get a useful backtrace from gdb. So I left a xterm running, killed kicker and started it from the xterm while in my home directory using
kicker --nofork --nocrashhandler
I then added the panel KSim and kicker crashed (disappeared) after about a minute. I got a "Floating point exception" in the xterm, but no core in the current directory. So no backtrace.
It is true that I have about 12 applets running (including gaim and Skype), but the crashes used to happen even before I installed Skype - it took me some time to isolate KSim as the culprit, since it only happens rarely, unless I make some clicks in the configuration dialogs.

Here's the backtrace. It is from a normally started (Alt-F2, no options) kicker, and this time the signal is SIGSEGV, and not SIGPFE as usual:

(no debugging symbols found)
Using host libthread_db library "/lib/tls/libthread_db.so.1".
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 1097024288 (LWP 8616)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[KCrash handler]
#7  0x41b8b3ea in KSim::PluginView::config ()
   from /opt/kde3/lib/libksimcore.so.1
#8  0x41b5170d in KSim::MainView::qt_invoke ()
   from /opt/kde3/lib/kde3/ksim_panelextension.so
#9  0x40d021f9 in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#10 0x41b3e750 in KSim::ConfigDialog::reparse ()
   from /opt/kde3/lib/kde3/ksim_panelextension.so
#11 0x41b4e74d in KSim::ConfigDialog::saveConfig ()
   from /opt/kde3/lib/kde3/ksim_panelextension.so
#12 0x41b4e7f6 in KSim::ConfigDialog::savePrefs ()
   from /opt/kde3/lib/kde3/ksim_panelextension.so
#13 0x41b4e8cb in KSim::ConfigDialog::qt_invoke ()
   from /opt/kde3/lib/kde3/ksim_panelextension.so
#14 0x40d021f9 in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#15 0x40d026a0 in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#16 0x4060e66c in KDialogBase::applyClicked () from /opt/kde3/lib/libkdeui.so.4
#17 0x4060e69d in KDialogBase::slotApply () from /opt/kde3/lib/libkdeui.so.4
#18 0x406a0573 in KDialogBase::qt_invoke () from /opt/kde3/lib/libkdeui.so.4
#19 0x41b4e853 in KSim::ConfigDialog::qt_invoke ()
   from /opt/kde3/lib/kde3/ksim_panelextension.so
#20 0x40d0215c in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#21 0x40d026a0 in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#22 0x4104a88c in QButton::clicked () from /usr/lib/qt3/lib/libqt-mt.so.3
#23 0x40d960c6 in QButton::mouseReleaseEvent ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#24 0x40d3c008 in QWidget::event () from /usr/lib/qt3/lib/libqt-mt.so.3
#25 0x40ca2a91 in QApplication::internalNotify ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#26 0x40ca3bf8 in QApplication::notify () from /usr/lib/qt3/lib/libqt-mt.so.3
#27 0x4092a97e in KApplication::notify () from /opt/kde3/lib/libkdecore.so.4
#28 0x40c3dc78 in QETWidget::translateMouseEvent ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#29 0x40c3ca9b in QApplication::x11ProcessEvent ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#30 0x40c50b7a in QEventLoop::processEvents ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#31 0x40cb9989 in QEventLoop::enterLoop () from /usr/lib/qt3/lib/libqt-mt.so.3
#32 0x40ca240f in QApplication::enter_loop ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#33 0x40e8ad0e in QDialog::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#34 0x41b51676 in KSim::MainView::preferences ()
   from /opt/kde3/lib/kde3/ksim_panelextension.so
#35 0x41b51823 in KSim::MainView::qt_invoke ()
   from /opt/kde3/lib/kde3/ksim_panelextension.so
#36 0x40604012 in KPanelExtension::action () from /opt/kde3/lib/libkdeui.so.4
#37 0x400644c7 in PluginManager::staticMetaObject ()
   from /opt/kde3/lib/libkdeinit_kicker.so
#38 0x4007823e in PluginManager::plugins ()
   from /opt/kde3/lib/libkdeinit_kicker.so
#39 0x4007972d in PluginManager::plugins ()
   from /opt/kde3/lib/libkdeinit_kicker.so
#40 0x40d01f3e in QObject::activate_filters ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#41 0x40d01fbb in QObject::event () from /usr/lib/qt3/lib/libqt-mt.so.3
#42 0x40d3bc9c in QWidget::event () from /usr/lib/qt3/lib/libqt-mt.so.3
#43 0x40ca2a91 in QApplication::internalNotify ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#44 0x40ca3bf8 in QApplication::notify () from /usr/lib/qt3/lib/libqt-mt.so.3
#45 0x4092a97e in KApplication::notify () from /opt/kde3/lib/libkdecore.so.4
#46 0x40c3dc78 in QETWidget::translateMouseEvent ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#47 0x40c3ca9b in QApplication::x11ProcessEvent ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#48 0x40c50b7a in QEventLoop::processEvents ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#49 0x40cb99a3 in QEventLoop::enterLoop () from /usr/lib/qt3/lib/libqt-mt.so.3
#50 0x40cb9886 in QEventLoop::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#51 0x40ca23df in QApplication::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#52 0x4007d127 in kdemain () from /opt/kde3/lib/libkdeinit_kicker.so
#53 0x41527ea0 in __libc_start_main () from /lib/tls/libc.so.6
#54 0x08048631 in ?? ()