Version:           3.1.2 (using KDE 3.1.2)
Installed from:    SuSE
Compiler:          gcc version 3.3 20030226 (prerelease) (SuSE Linux)
OS:          Linux (i686) release 2.4.20-4GB

I first found this with Konqueror but have since found that it happens with ALL KDE apps (e.g. konsole, kcontrol, k3b, etc.). When the question mark button (in the top right corner of the window) is clicked or the "What's This?" shortcut key combination is pressed (also choosing "What's This?" from the Help menu), the window decorations disappear from all open windows. The app that the action occured in then crashes. 

This happens each and everytime I try to access "What's This?"

Following is the backtrace:

(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)...[New Thread 16384 (LWP 22325)]

(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)...0x410fd387 in waitpid ()
   from /lib/libpthread.so.0
#0  0x410fd387 in waitpid () from /lib/libpthread.so.0
#1  0x40651029 in KCrash::defaultCrashHandler(int) ()
   from /opt/kde3/lib/libkdecore.so.4
#2  0x410fc1ec in __pthread_sighandler () from /lib/libpthread.so.0
#3  <signal handler called>
#4  0x412c2463 in strlen () from /lib/libc.so.6
#5  0x4157b24f in _XcursorBuildFullname () from /usr/X11R6/lib/libXcursor.so.1
#6  0x4157b5fe in XcursorScanTheme () from /usr/X11R6/lib/libXcursor.so.1
#7  0x4157b794 in XcursorLibraryLoadImages ()
   from /usr/X11R6/lib/libXcursor.so.1
#8  0x4157b7e5 in XcursorLibraryLoadCursor ()
   from /usr/X11R6/lib/libXcursor.so.1
#9  0x4094d52b in QCursor::update() const () from /usr/lib/libqt-mt.so.3
#10 0x4094d128 in QCursor::handle() const () from /usr/lib/libqt-mt.so.3
#11 0x409719c6 in qt_x11_enforce_cursor(QWidget*) ()
   from /usr/lib/libqt-mt.so.3
#12 0x4093c3d8 in QApplication::setOverrideCursor(QCursor const&, bool) ()
   from /usr/lib/libqt-mt.so.3
#13 0x40b81af0 in QWhatsThis::enterWhatsThisMode() ()
   from /usr/lib/libqt-mt.so.3
#14 0x41741400 in KWinInternal::Client::contextHelp() ()
   from /opt/kde3/lib/kwin.so
#15 0x4174423c in KWinInternal::Client::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/kwin.so
#16 0x419b5b8e in Keramik::KeramikClient::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/kde3/kwin_keramik.so
#17 0x40a1bcec in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /usr/lib/libqt-mt.so.3
#18 0x40a1ba8c in QObject::activate_signal(int) () from /usr/lib/libqt-mt.so.3
#19 0x40db7b2c in QButton::clicked() () from /usr/lib/libqt-mt.so.3
#20 0x40ac6e22 in QButton::mouseReleaseEvent(QMouseEvent*) ()
   from /usr/lib/libqt-mt.so.3
#21 0x419b9312 in Keramik::KeramikButton::mouseReleaseEvent(QMouseEvent*) ()
   from /opt/kde3/lib/kde3/kwin_keramik.so
#22 0x40a59ad4 in QWidget::event(QEvent*) () from /usr/lib/libqt-mt.so.3
#23 0x409b429f in QApplication::internalNotify(QObject*, QEvent*) ()
   from /usr/lib/libqt-mt.so.3
#24 0x409b373d in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/libqt-mt.so.3
#25 0x405dd999 in KApplication::notify(QObject*, QEvent*) ()
   from /opt/kde3/lib/libkdecore.so.4
#26 0x409400f0 in QETWidget::translateMouseEvent(_XEvent const*) ()
   from /usr/lib/libqt-mt.so.3
#27 0x4093d5d5 in QApplication::x11ProcessEvent(_XEvent*) ()
   from /usr/lib/libqt-mt.so.3
#28 0x40954b0c in QEventLoop::processEvents(unsigned) ()
   from /usr/lib/libqt-mt.so.3
#29 0x409caab3 in QEventLoop::enterLoop() () from /usr/lib/libqt-mt.so.3
#30 0x409ca9a6 in QEventLoop::exec() () from /usr/lib/libqt-mt.so.3
#31 0x409b451f in QApplication::exec() () from /usr/lib/libqt-mt.so.3
#32 0x41745415 in kdemain () from /opt/kde3/lib/kwin.so
#33 0x0804ccd0 in strcpy ()
#34 0x0804d983 in strcpy ()
#35 0x0804de90 in strcpy ()
#36 0x0804eca2 in strcpy ()
#37 0x4125c857 in __libc_start_main () from /lib/libc.so.6