Feedburner error - An error occurred connecting to the URL: unknown error

I am trying to put this RSS feed into feedburner.
http://cns.utexas.edu/news/categories/marine-science?format=feed&type=rss

However I keep getting this error.
An error occurred connecting to the URL: unknown error
Identify Feed Source

The feed URL you entered is:

http://cns.utexas.edu/news/categories/marine-science?format=feed&type=rss

We could not find a valid feed at that address.

I have confirmed that the RSS is valid.

Any ideas why feedburner wont accept my RSS feed from EasyBlog? This was a recent change, my EasyBlog RSS feeds from last month worked no problem.