So, after a bit of work, I got my site working with <a href="/tags/Omnibear" class="hashtag" title="Omnibear tag">#Omnibear</a>. It was a nice push to actually get me to work on my form-encoded <a href="/tags/MicroPub" class="hashtag" title="MicroPub tag">#MicroPub</a> endpoint, instead of only focusing on the json endpoint.