I have a really good one. I've just built a new webpage on Yahoo. I can see it on my PC, on the same network, but my mac can't. I can't see it with safari or firefox. It doesn't even try to connect and says 'cannot connect to server'. I've never had a problem connecting to ANY website on this mac. I've flushed the cache, reset safari, and even switched to open dns. Nothing. Any ideas? This one is perplexing.