1. Full signal strength and no connectivity? Doesn't matter if you are on top of the router?
2. Turning the airport off and onmagically makes everything "work" again.
3. There is no method to the madness. Sometimes it works for hours no problem and others...
4. The console.log file has errors that look like this:
mDNSResponder: SetupAddr invalid sa_family 0mDNSResponder: getifaddrs
ifa_netmask for fw0(7) Flags 8863 Family 2 169.254.59.71 has different family:
0mDNSResponder: Repeated transitions for interface en1
5. Do you have other MBP's with the same setup and NO issues?
Let us know we thought we were the only ones with issues on one out of 10 of our MBP's. We exchanged it and that ended our problem. Never to resurface again.
Post your findings in the comments!