Yeah, it's that new tilt wheel mouse where the wheel on your mouse goes side to side as well as rolling forward and backward.. It doesn't ROLL side to side, just leans kinda. I've taken it off my computer because the durn Pan when you push down on the wheel would take like a second to invoke the pan command.. Dang near drove me nuts.. It was so bad, I almost switched my avatar to a crazy lookin cow or somethin..