I have tried in both IE9 and Chrome 23.x. The error page suggests there is something wrong with MIME type or a Handler that is not configured correctly.
SOLUTION: Open IIS Configuration and scroll down to MIME Types. Double click to open and after double checking discovered JSON was not listed. After right clicking and selecting ADD, I entered the extentsion JSON and the application type as "application/x-javascript". This has fixed the problem for my localhost.
I just wonder if there is going to be a similar problem for client browsers who will be loading my pages over the Internet or if this is just a Intranet issue... time or someone much wiser <g> will tell!
--hm
PS - thanks for changing the icon to "new message", it almost got me again!<s>