I know, mea culpa. Last server update turned on my rewrite of the replay server and it's not working too well. I'll fix it and in the meantime I'll ask our server guys to revert to the previous version.
The test has ended, mostly successfully. We had 1 case of a replay prematurely ending, of course we failed to reproduce it afterwards. I'll have to think about it. Other than that the server seems to work fine. Many thanks to all the testers!