Originally posted by Powaqqatsi:
I think you should install the Logitech Control Center and be sure that there is nothing in front of the "eye", sometimes when my cat passes by, I have some hairs that are stuck under the mouse and it gets all jumpy and stuff
. I don't know what you mean with the keys not being the same.
Maybe your mouse is just scared of your cat.
This might be a obvious, but you never know. I have a logitech and it gets very jump when the battery needs to be replaced. Also, I would recommend you use USB overdrive instead of the logitech drivers, just my preference, but I have never looked back.