I did a fresh checkout & compile and it seems to be working fine now. Username is "Fodah" so that's probably not the problem.
Then it shall remain a mystery forever!
That error means something like a chat string like is printed to you when you first join is over the limit.
This is probably fixed since rev 393. Fodah, can you please try any recent revision and confirm? If fixed, please add a "[fixed]" to the post header. Thank you.