The Web is an interesting place, when we start distributing systems over diverse physical locations fun things can happen. One person can have access to a resource, while another one is denied.  Chicago says but it works for me while Columbus says, it's down for us.  Today after a 4 or so hour outage of FedEx Web Services that's precisely what happened as the systems were coming on line.

Check out this screen shot

 

There are 2 browsers open both refreshed at the same time, one working, one not.  The difference is Internet Explorer is seeing a network 100 miles away from the network that Firefox is seeing.

About 15 minutes later both were on-line.  That's geek cool!