I purchased a second generic AC adaptor on Ebay so I wouldn't have to keep moving my Apple adaptor from room to room. I noticed that my touchpad was acting erratic. After a couple of weeks of this behavior, I decided to ditch the generic adaptor, which I was using frequently, and only use the Apple AC adaptor. My problems with the erratic touchpad seemed to have disappeared...and hopefully will stay gone . Could the generic adaptor really have been the issue and caused the erratic touchpad problems?