Getting webpage content of a website

Hi,

I have created a vb.net app to get source code of given url, it works really fine for 100s of webpages but i came across this particular website:
http://www.sbuniv.edu/

it gives as http status code:200 OK
But when i tred to displayed the html source code, it shows some small square box like "how it appear when you open word in text".
The site is in English and its utf-8. i am not sure what the exactly the issue is. i know its nothing to do with my code and it is something to do with the site.
It think misses some header info but it show the content type in my application, so i am puzzled.

---------------------------

---------------------------
�
---------------------------
OK
---------------------------