If you look at the HTML source for the URL above, you will see that the <code> tag in the wiki source is incorrectly rendered as:
<p><code>
</p>
This leaves the <code> tag unclosed (though it's later closed in a similar mismatched block). While various tidiers will clean this in different ways, those wikis that don't have tidying enabled, as above, will emit pages with invalid HTML. Even for those that do, the handling of the tags changes from one implementation to the next. (In testing the bug on different wikis, I found unfixed, rendered as <p><code> and completely re-written inside of <pre> tags, as is done on MW.)
Version: 1.22.2
Severity: minor
URL: http://sourceforge.net/apps/mediawiki/dotnetwikibot/index.php?title=Main_Page