Sometimes when I rate a track while it's in the play queue, the track is rated correctly* and Play skips ahead to the next track. I'm having trouble reliably duplicating the behavior, though; it only seems to happen when I least expect it.
I haven't seen this happen in the library yet, but then the majority of my rating has been happening in the queue (despite the occasional frustration

* Also, I reckon this is as bad a place as any to bring up a minor UI annoyance. Why, when I click in the center of star 4, is the value set to 3? Is this a placeholder for partial ratings, or simply capricious UI design intended to drive people like me just that tiny bit crazier?