I already did a factory reset and went to Messenging > Settings > Vibrate. Is there a different setting? UPDATE: I e-mailed verizon and they said it's not a "known" issue. UPDATE (Oct. 26): I went to VZW today and according to them, it is a well known problem with the Motorola Droid and Droid 2. They are sending me a replacement to see if it helps.