From: Marc on 12/28/2002
It would seem that there is a serious bug in the Synaptics driver! I have a DELL Latitude and found a whole thread on the DELL support site about it.
#1) Try disabling "Tapping" in the Synaptics preferences
#2) Uninstall the driver for Synaptics touchpad and let Windows use the standard PS-2 mouse driver
#3) Update the Synaptics driver with the new and improved version?
(haven't updated to the new driver yet... but from what I read online it's a synaptics driver issue)