I don't know if this is a problem with RefTagger or with the forum software, but since there isn't a "Forums" forum, I'm posting this here:
I've found one particular instance where RefTagger doesn't work on what is clearly a Scripture reference.
Here's a link to the page where it doesn't work (it's the Ps 90.10 reference inside the quote in Francis's post where hovering over the reference doesn't bring up the RefTagger popup).
Here's a screencast demonstrating it.
http://www.screencast.com/t/BqvgBzJ2Mjt