Couldn't find a dedicated thread for this, but if there is one I'm sorry - please point me in that direction. I have bad lag on my Magic Mouse with 2006 Mac Pro, which seems to fit what users are reporting here: http://discussions.apple.com/thread.jspa?messageID=10506086 The cursor often stutters and scrolling is often jumpy. It's the cursor thing that's really bugging me, I can be moving it across the screen and it's as if it keeps bumping into brick walls. Running Leopard, with the mouse update installed (i.e. multi touch is functional). Anyone else experiencing this? Anyone got any fixes?