I'm having the same problem right now.
Also, on the Joey, (this has happened a couple of times), when starting up, it just cycles through songs (like you are pressing the skip button) rapidly and will not stop doing so (while on QUICK MIX).  I tried Pandora on the Joey for the first time last Sunday night (just set it up for the hopper that afternoon - worked great there) and it did that too.  I logged in and out a few times and finally switched it from Mix to another station.  It would not load ANY songs when on a "station".  Eventually I got it to play a song, but no audio.  Screwed around with it for another 5-10 minutes and worked fine.  Seems to be buggy...