Quote Originally Posted by Jeff View Post
To the best of my knowledge nothing has been modified on the software side (though as I'm not the web master any more this might not be 100% accurate). Normally I would anticipate this sort of "artefact" to be caused by a slip of the finger. Sometimes dropping a single (and apparently unimportant character) can cause software to miss-interpret what you wanted.... Just one of those things.
It looks like it's confined to that post, no update have been done and the only thing I can think of is the permission sets for the topic have disabled tags.