For a few weeks now my rss feed on this blog was not working and it took me a while to track down the problem. When I ran the feed through the feed validator it reported that the feed was being returned as text/html as opposed to text/xml.
After alot of testing and trying to track the issue down, it eventually turned out to be due to a wordpress plugin that I installed a while back to do syntax highlighting called WP-dp.SyntaxHighlighter. It did the trick with the syntax highlighting for code snippets but it totally messed up my rss feed. In order to fix the feed I deactivated the plugin and began the search for a similar plugin which wouldn’t mess up the rss feed. I have just installed the WP-Syntax plugin as a replacement code syntax highlighter plugin and it works a treat without breaking my rss feed.