I have 400 movies and 15,000 songs in itunes on my mac mini that connects wirelessly to my router. Both my apple tvs are connected to the router via ethernet. Just in the past couple months, both my apple tvs are dropping their connection to my mini (itunes) after 20 minutes or so of playtime. I can then go to my mac mini and turn off wireless, then turn it back on and the apple tvs recognize my itunes library again and I can stream for another 5 minutes or so then it drops again. I can also quit itunes and restart itunes and the apple tvs recognize my itunes library again and then only stream from it for like 20 or so minutes again. Any fixes, I have read on Apple support forums stuff about this but it is hard to find/follow my exact issues, but I believe I am not the only one. Everything is up to date firmware. Thought I would throw this up here at AVS maybe one of you geniuses knows what's up.