The results of the previous three tests are interesting. In both IE7 and Firefox all three render correctly (although the PRE tag in the first one causes the text to spill into the right hand bar). When viewing the RSS feed it becomes a whole new story:

• IE7 doesn't honor PRE tags, single spaces or stylesheets
• Firefox doesn't honor PRE tags, single spaces or stylesheets as well but at least it cuts out the embedded stylesheet in the last post
• Google Reader also doesn't honor PRE tags, single spaces or stylesheets and to cap it all anything in a PRE tag just renders to the end of line and stops so it makes things impossible to read

I wonder, is there a standard that feed readers need to adhere to? What is the best way of embedding syntax colored code in blog posts?