Froyo has taken my droid x from the perfectly fine condition it was in with 2.1 to a state that has so many bugs that I almost returned the phone 3 weeks after buying.
This music player issue also happens to me and crashes the phone... lags... skips and stutters anytime I stop/start tracks, and a whole slew of other issues. Even the autocorrect and text input ability isn't as good. As much as I love droid, if this isn't all resolved in the very near future, ill be shopping for another brand.
Please forgive any typos as the text lags/freezes, autocorrects to wrong words after I've already types 3 more, and hides text input on most webpages so that I can only see the last line or so of text. Sometimes I can't see text at all and have to hit back and try to reset the input, but that usually just leads to more frustrations and super slow typing speeds.
And many.... many.... other issues both minor and major. I now have a droid (my son uses it) and a droid x both on froyo. Both with same issues. Both freezing/rebooting now. Joy.