The content type for the resource is incorrect.
IncorrectContentType
Level
Warning
Category
Content
Description
The content type "text/html" does not match the content type of the HTTP response from URL.
Recommendation
Change the content type used in the response to the recommended content type.
These violations are from the Bing SEO Toolkit, and are the same violations that Bing finds when crawling the internet, it is a safe bet that Google would find much the same violations.
"exactly the same as the crawler of the search engine will see it"
Date Recorded: 2011-11-07