No - actually I don't think anyone else has reported problems with the G-Sense touch pad.
I think it's one of the VP's best features and very accurate.
Have you calibrated it ? From what you report this is the most likely cause of your problems.
There are at least 2 types of sensitivity setting (something like set up for either finger or thumb use!!!)
Alternatively (if the above doesn't work) the software that drives the pad could have crashed - try a reboot by pressing a paper clip into the small hole in the base of the unit
I hope this helps
