I have searched for hours to the solution but I haven't been able to find one! I don't know what else I can tell you besides that I have Snow Leopard, disabled (and then trashed) peerguardian, have tried disabling the mac firewall and Glimmer Blocker (adblocker), and even tried resetting my router. What is weird that my ipod touch is able to access all these sites but Safari and Firefox can't. All of this just happened today. T.H.A.N.K. Y.O.U to everyone!