One of the things that really irritated me when I made the Ubuntu switch was the sensitivity of the laptop touchpad. It seemed to fly all over the screen and while browsing the web it appeared to open phantom links.
Here is a short walkthrough for turning off the 'tapping' feature in your touchpad and other touchpad irritations.
Backup your Xorg
Open your xorg configuration file for editting
$ sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.backup
Add this line at the bottom of the "InputDevices" section
$ sudo gedit /etc/X11/xorg.conf
Reboot the system or restart your gdm session
Option "SHMConfig" "on"
Install qsynaptics package
$ sudo shutdown -r now
$ sudo apt-get install qsynaptics
Once in qsynaptics, select the "Tapping" item from the listbox on the left hand side of the program and change the button configuration to Tapping "One Finger" means none.