This seems to be because of 2.2, it didn't do it before the update. I have it set to "face book pop" but after awhile it goes back to "droid". It's not that big a deal but it sure is annoying. That "droid" tone was neat for like five minutes then got on my nerves so I changed to the more subdued noise. I wonder if anyone else is having this issue or maybe I'm doing something wrong.