if you have issues with tapping function or scrolling function with your touchpad, then you can type the following in terminal to fix it

Code:
modprobe -r psmouse
modprobe psmouse proto=imps

to make the changes persistant create a file under /etc/modprobe.d with anyname.conf

Code:
options psmouse proto=imps
followed the debian wiki at this link for this fix: http://wiki.debian.org/SynapticsTouchpad