Not unheard of, my netbook with shitty cheap power cable does the same. It's interference created by it running too close to internal USB iirc.
Google touchpad and interference, you'll get loads of hits.
EDIT: Not that I have any idea what that means.
Edited by Metalfish at 22:37:42 22-01-2013
#9313429, By Metalfish The "fucked if I know" PC problem thread
Metalfish 9,090 posts
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