Had a mousepad, ditched it thinking that was the problem, so was just on the desk, back to a new mousepad, still jumping.
The wireless is brand new, got it last night. Both it and the previous wired one are both optical. (not using the batteries it came with-I put in everreadys)
The transmitter is under the desk by the wall; the tv and phone are about 6 feet away, around the corner (my area is in a sort of alcove of an L-shaped room).
I bought the wireless because it was $7 cheaper than the wired optical....I don't like it-it's tiny so my hand is cramping and it seems to jump around a bit more than the wired one did.
This is really frustrating.....and the first person that says 'reformat!' gets it right between the eyes!
