In the last day or so, my Droid X has stopped vibrating when I receive a text message. It doesn't matter whether or not the phone is in Silent Mode or whether or not it is set to vibrate in the main sound menu. I have double-checked my text message settings, and the notifications are set to vibrate. I'm using the default texting program. I've found a few 3rd party apps that partially solve my problem, but I hate to have to rely on them for something that I know the phone should do. Does anyone have any thoughts? I really appreciate it.