I get a similar problem! I keep needing to unplug my D-Link Router... but only with Passionford, all other websites are fine.

Passionford Web pages will load normally for a certain amount of time then i`ll just get "This page cannot be displayed", unplug the router for a few seconds and all is fine again But only happens with Passionford, absolutely no other website does it

Have to admit its starting to get on my tits a little bit