Sorry if this is a dupe... I posted and now don't see my reply.
Anyways... the same thing is happening to me that jpekelsma described. As I search forums around the internet, I'm seeing many people affected this way.
In my case, I can't access myspace, washingtonpost, and a few others. This is on 4 browser on 2 puters (Mac & PC) on my home network. If I use a different LAN, I can load these web pages, so it's not my browser settings. I just get a blank browser window, it says "Connecting" or "Loading" but nothing loads. All other web pages work fine. My router firmware is updated, browser & OS are latest versions. I've trying many suggestions about clearing cache, DNS settings, etc. Nothing helps!