I'm having weird Air Tunes drop out issues after some recent hardware changes. I've been using he same Airport Express for 5 years now. No issues. Yesterday I got a new MBpro and suddenly I started having issues with the Air tunes. When playing music from the new computer to the Airport Express, it works fine until... Any serious downloading occurs, any new computer joins the network, or any iphone tries to manage the iTunes library via remote. As soon as another wireless device comes into play the music gets choppy and cuts out. The network (and Air Tunes) continue to work fine if my old PowerBook G4 is the host, playing the music. But with the new MBpro it's a different story, choppy... Thoughts? Thanks.