Q: Trackpad calibration

You could try changing the Tracking speed, do this: Prefrences> Trackpad> point and click> Tracking speed is at the bottom, drag it to fast and see if it helps.

This is the built-in track pad?  There is no user calibration for the trackpad.

Limited setting in the System Preferences>Trackpad

also System Preferences>Accessability> Mouse &Trackpad

http://support.apple.com/kb/TS1449

Genius reservation http://www.apple.com/retail/geniusbar/

check warranty https://selfsolve.apple.com/agreementWarrantyDynamic.do

try restarting your computer. i was having the same issue and it was solved by a restart