I installed all suggested updates yesterday and this morning Safari, iTunes and Software Update can't connect to the internet BUT FIREFOX HAS NO PROBLEM. I ran Network Diagnostics and it says my connection works perfectly. I checked the proxies, it's on auto discovery, seems alright to me. I checked the DNS, and changed them several times, nothing works there... I verified every forum, no good answer. I'm not a pro but if anyone has a suggestion, i'd be very grateful. I'm now trying to uninstall and re-download safari 5.0.3 again see if it's a miracle... -Intel Macbook running OS 10.6.5 Thanks!