I have the current generation $599 Mac Mini, with Nvidia graphics (just to clarify the model). My wireless network is setup from an Airport Express. My iMac, Powerbook, iPhones, Apple TV, Wii, etc. can all stay connected without problem. However, my Mac Mini loses the connection constantly. It shows full signal, but then it drops out 100 percent for a few minutes, nonstop all day. It makes it completely useless effectively. What kind of settings and things could I try to change? Or, is this likely a hardware issue? Many thanks.