Wikimedia Bugzilla is closed!

Please see the demonstration at http://www.mediawiki.org/wiki/Template_talk:R .

{{R}} does not render, no matter what content is within [[Template:R]].  I cannot find any default 
variable that would conflict with a template of that name.  If I use a lowercase "{{r}}", the template 
works.  I've tried several other single-letter template names and no others had a problem.

I think this was a recent change, something definitely within the last 6 months, as I previously did 
have a template that worked.