New MacBook Pro early 2011 doesn't play nice with Home Sharing

Just wanted to pass along my experience with a new 17 inch MacBook Pro quad-core. They don't seem to play very well with Home Sharing. Picked mine up at the Apple store on Friday. Set up Saturday, and at first all seemed well. Was able to stream to my Apple TV 2nd gen just fine. Then, later in the day, although the Apple TV could see the name of my iTunes library, it wouldn't connect to it, or sometimes, would report that "There are no movies in this library". I tried every solution I could think of, but no dice.

Apple phone support were great, but couldn't diagnose the problem. They had me do data capture to send to Apple engineering. Took the MacBook back to the Apple Store. The very helpful Genius there was able to reproduce the problem on the store's network with an in-store Apple TV. A replacement maching was offered, and we tested the new machine before I left. Same result. Brand new iTunes library with only 6 songs in it would not stream to Apple TV, and iTunes could not be controlled with other iOS devices. So, refund for now. The folks at the store were really great though, so at least it wasn't a bad experience.

I've notice two other people in the "Using iTunes" forum reporting the same problem. In all cases Airport base stations were the networking equipment being used. I expect if this is a widespread issue, some sort of update will be offered.

My question is, are any other new 2011 MacBook Pro owners having the same issue?