Try updating your PRL's.... not sure if it'll help but it's a start (*228, option 2)
Other people suffered from this issue as well, some had it resolved with the 2.0.1 update, while others exchanged their Droids... you might want to give VZW a call (*611) and see if it warrants an exchange.
I had this problem as well as the speaker phone not working at all. Verizon had me exchange the phone since I was within my 30 days. I now have a 47/09 build phone, so lets see how this one works.