To all those who hit this after installing 11.3:
Enable the tapping function of your touch pad by adding
Option "TapButton1" "1"
then restart X (relogin). It will work with all WMs for which SuSE didn't bother to add a GUI config function/utility (xfce, WMaker, twm/fvwm, etc).
To SuSE: WHY?????? Why is this disabled by default? Why has a system/HW function to be enabled at WM level?? Why only KDE/Gnome?