I'm having the same problem, also with pandora premium, on my pc accessing the website, playing a playlist; I click on the circular repeat icon and nothing happens. There is no error message. It happens with every song I try. It's the repeat button -- the circle with two arrows. I'll check firefox troubleshooting now. (Also, for what it's worth, the shuffle button to the right of the fast-forward button doesn't work either, in exactly the same way. However the shuffle button on the left side of the screen, below the image for the playlist, works to turn on shuffle -- but it doesn't work to turn it off; I had to play a different station to get shuffle to turn off.)
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