Streaming from iTunes issues since OSX Lion

Hi everybody!
I have a Mac mini that I use mostly as a HTPC and an iTunes server. I use it to stream iTunes purchased videos to an Apple TV (Wifi) and an iMac (Gigabit ethernet). I never had any issues doing this with Snow leopard but ever since I switched to Lion, it lags like hell on both Wifi and Gigabit ethernet.

At first I believed that it might be an issue with the mac mini so I transferred all my iTunes library to the iMac but the issues persists on on both wifi and gigabit.

Both the iMac and the mac mini can play the videos locally just fine and there is no other issues with the network, I checked ant it works flawlessly otherwise.

Anyone else has that issue? Besides braining myself what can I do?

Thanks

OSX Lion was the problem

Well it turns out that Lion was the problem after all, I re-installed Snow Leopard on the Mac Mini and everything is working well.

Since when does Microsoft works on OSX?