After we posted that Verizon had begun their rollout of the Froyo update for the Droid X yesterday, a number of people told us they were having issues with music and ringtones on their devices. As this seems to be more than an isolated incident, we pinged Verizon to check if they were aware of the issue or had anything in the works. Unfortunately, all we received back was a curt "We're looking into it."
It doesn't seem to be affecting more than a minor percentage of users, so it's likely most people updated without a hiccup. Still, this is the only time we've had multiple users complain of the same bug on an update (at least, in recent memory).