Hoping someone can help me with this. I've been having a strange connectivity problem with my wireless network at work (home works fine). I can connect to the network with full signal in the menu bar, but when I open Safari, it says I'm not connected. If I launch the network utility (from within Safari), the first two lights are green, the third yellow, and the last ones red. Now comes the weird part...if I simply click through the choices in the diagnostic for the proper network, everything suddenly turns green and works fine. This isn't simply a matter of not waiting long enough to connect, because the network never works until I step through the diagnostic procedure. It also isn't a general airport issue, since I can connect at home just fine. I think this problem may have started when I upgraded to 10.5.4, but I'm not 100% certain of that. Any thoughts??