I posted this in the peripherals section, thinking it was a hardware problem with my mice (Mighty and Magic). But I've since reinstalled iTunes 9.2.1 and the problem is still there. Here's the background: A few months ago, I switched from a Mighty Mouse to a Magic Mouse (thanks to a Father's Day gift from my kids). At first, no problems at all - except learning how to do all the things you can do with a Magic Mouse. ;^) Then, a few weeks ago, I started noticing that if I double-clicked to play a song in iTunes, the genre of the song would change to "(n)" ("n" is a random integer, so the genre became (3), (8), (11), (21), etc.). This also would occasionally occur if I lifted and moved the mouse to another part of the screen. I guess I could understand if it changed from "Rock" to "R&B", but random numbers? Thinking I was having a Magic Mouse problem, I switched back to the Mighty Mouse - but the problem remains. :^( I've turned off BT to see if that is the source - shouldn't be, since the Mighty Mouse is USB. Any ideas what might be causing this? I have almost 10,000 songs in iTunes, so trying to find all these random genre changes is a bit frustrating. Are there some settings in the Magic Mouse that need to be adjusted? Or is this a "feature" ;^) in iTunes 9.2.1? I think this was updated around the same time I switched mice. Thanks for any pointers . . .