I was experimenting different themes with my BlogEngine blog and noticed not all of them show the correct color coding of my source code examples. There is a simple fix for that which is to copy the section of style.css file related to "Syntax Highlighter" from a working theme to the style.css of the theme you like. That should do the trick.
7fd593b1-0f17-4f24-b0a6-bc882e54cad5|24|2.2
BlogEngine, blogging
codeformatterextension, blogengine