This problem can be caused by the amount of current flowing in the "Hot" (black) wire being different than the current flowing in the neutral (white) wire. While this can happen as the result of a hair dryer falling into the bath tub as the GFCI is designed to protect from, it can also happen...
I am very interested to see more of your Ripoff table, but Photobucket isn't allowing me to see the pictures. Is there some way you can repost them or just email them to me?
Thanks,
Jack