BUG? Graphing http response times of long URLs

I have several hosts that I am graphing the http response time (Hobbit automatically does it when you use the /http/ option in bb-hosts). I have noticed that hosts where the http URL I am checking (I also do /cont/ check), display no graphs on the http page nor the trends page.

I am assuming this is because the URL is in the graph legend, and perhaps the extra-long URL is breaking the graph generation somehow?

-Charles