The server is being hammered pretty hard at the moment. It's taken on 30-40 simultaneous users before, and worked without a glitch. Now it's around 50, and a few seem to be going beyond the normal update rate.

At some point I will have to enforce a harder rate limit, and/or build better spam protection. The app has been pretty much unused for the last 5 months though, so there hasn't been any real reason to focus on that part :)