I have a 2008 unibody MacBook Pro. When I am doing a wireless Time Machine Backup it interferes some how with my Bluetooth Mouse which is a Mighty Mouse. I have two of the Mighty Mouse and they booth do it. The cursor stutters across the screen and is sluggish. If I use the MacBook Pro's touch pad it is fine. This is annoying only in that when using my external monitor the lid on the pro is closed so I have to wait until the back up is finished to restore normal mouse operation. Anyone have any thoughts on this bizarre behavior?