I sometimes have the same sort of problem with many different sites.
Happens with MSN/Live, ATI/AMD support pages, Microsoft, Windizupdate, and probably some more.
It happens intermittently, and for apparently no reason, unless this counts - I notice that most of the time when this happens, my wireless connection icon says that it is connected with excellent signal strength, but says nothing about the speed, this also happens in network connection properties (left click icon in system tray).
The problem never happens when the speed is reported, but it sometimes doesn't happen when it isn't shown, if that makes sense.
Some other applications fail to connect entirely when this happens, such as Spybot:S&D, Spyware Blaster and Antivir.
Also, sometimes IE will connect to the page but will refresh it several times, then display an "unable to connect" page. The network troubleshooter it directs me to reports no problems.
Apologis for the thread hijacking, but I just thought I'd let you know that there are other people with the same problem - I haven't made my own thread because this hardly ever happens with me, so it doesn't bother me so much, but if anyone finds a solution I'd be interested, I'll keep checking this thread.
Plus I hope that someone can help wizz, I'm just sorry I couldn't