I get the following errors in Safari 5 when it tries to go to the next track:

    TypeError: Result of expression '(d||f||i.body)' [null] is not an object.

    560/javascripts/jplayer.js?1277763781:398INDEX_SIZE_ERR: DOM Exception 1: Index or size was negative, or greater than the allowed value.

That 560 is the error count for that second error at the time I copied the text. It was increasing quite rapidly.