Suddenly, I noticed that I was missing tons of calls. I just assumed it was due to poor reception at work, but the other day I had my phone in my hand while receiving a call, and noticed it wasn’t vibrating any more. I tried resetting the phone, removing apps, restoring. Eventually I just gave it a good hard old fashioned whack and the phone started vibrating when I called it again. In looking at the apple support fourm, I guess some other people are having the same issue. I’ll probably take it in to the Apple Store to see what they say, but this is not a good sign for an 8 month old $400 phone.
UPDATE: Now that I think about it I don’t believe it is vibrating as strong as it used to.
UPDATE2: I made a post to the Apple support forums saying that I fixed the issue by giving the phone a whack, but they deleted the post claiming it was bad advice. I can see their point.
UPDATE3: I posted this 3 years ago, and it is the top source of visits to this blog. Bumping this to the first page since many people found it useful.