Hoping to get some help. I'm running two machines - a MacBook Pro and a MacBook Air. Both are connected to the internet via my Airport Extreme Base Station. Every now and then (several times a day) my internet goes down on my MacBook Pro but not my MacBook Air. This lasts for a good minute or so and Network Diagnostics shows that the Airport is working fine. "Internet" and "Server" are reported as Failed. I've attached a screen shot. Msn continues to function as normal. And my MacBook Air continues to work as normal. I've restarted my computer and repaired permissions but this continues to happen. Anyone have any ideas?