My setup - Spring 2010 MBP (base model with 8gigs of RAM) running Lion 10.7.2, Apple Airport Extreme router, and Apple TV 2 (latest update applied). Firewall is on, on the MBP. AppleTV 2 sees my computer in the list of available computers (my wife's laptop running Win7 and iTunes 10.5 also appears). When I try and access my library, ATV2 spends about a minute searching, and then gives a message that it's unable to access my library. No problems accessing my wife's iTunes library. As a check, I have an external HD loaded with Snow Leopard. I switched to that drive, and ATV2 can access and play the contents without any problem. Thoughts/suggestions? As a side note, when iTunes went from v. 9 to v. 10 on Snow Leopard, in order to get it to work properly, I had to uninstall iTunes 9 and manually install v. 10. would doing this for the latest version possibily fix the issue? Thanx!