On snapwikiwiki's homepage, the first line is not properly parsed occasionally in the Wiki News section. However, if you visit the page containing wikitext for that section, you will find that it is parsed properly there. It was working even yesterday but was found broken today (before I made an edit removing an empty line on that page today).
It has something to do with transcluding. I was mitigating it by adding an invisible character (). It's in the parentheses. Also, it might have something to do with using a template that transcludes... It may even be the template itself!