I have a Macbook pro running leopard, an old PC, and an iPhone all using the same wireless router. None of these are running any blocking or filtering software (that I know of). The PC and the iPhone can connect to cracked.com and namebargain.com just fine. But the Mac can not find these 2 sites, and these 2 sites only. All other websites I visit work just fine. Does anybody know what is going on here?