According to Netcraft
, that site is running Microsoft-IIS/5.0 on Windows 2000.
Microsoft servers assume that they are talking to another Microsoft machine and they skip several communications protocols (so that it appears that their servers are actually faster) in connecting to each other. They are suppose to drop back to a standard protocol when another standards conforming OS replies with the "what the hell did you send me" error, but sometimes Windows sysadms don't have a clue how to set it up correctly.
I can't stand their "Embrace and extend" business practices.
Sorry, there may be no help for your problem.