One of our users decided to attempt penetration testing on Testing Perfection. Godly and I approved it beforehand, as we did not expect that any exploits would cause an error of this magnitude; I figured he was just going to test the new NAML features, and at worst we'd get a NAML Error 500 or some JavaScript alert boxes popping up in our pages.
He emailed me the details of the exploit that crashed the forums, and has decided to cease any further such tests until further approval is given. Hugo, I will send you what he sent me; it may help you find and fix the bug.
We apologize for any inconvenience we may have caused. I think it'd be best for us not to attempt any more exploit testing without first seeking approval from you or another official Nabble administrator.