Far from a bug, but thought I'd mention it. Whenever I paste in a link to a post on my site on Facebook, it grabs the static text from the community tab rather than anything from the post. I'm guessing Facebook just looks for the first H1 and H2 tags on the page.
I'm thinking maybe the community section could use different classes than H1 H2 or else perhaps move that section of code to below the post meta or something? I dunno. Not a huge problem, just thought I'd mention it.