I'll cover this in a grumbley post later, but basicaly, PHP stuff running from cron runs in safe mode, which breaks a whole BUNCH of stuff with the server. Fixing that.
Until it's fixed, the game part of the server is down, and only the chat part works - sorry 'bout that 
Hrm, I think I need some way in the client for users to know when the game daemon is active, too. Otherwise, all they see is themselves sending a challenge and the opponent not getting it.
But first, got to get this darn thing working...
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Aaaargh. That was WAAAY more complicated than it need be.
And I can't blame anything other than myself. I was an idiot. I did idiot-things.
I had ">15" where I should have had "<15", and it took me all day, rewriting all the code around it several times, to find that stupid, stupid typo.
On the plus side, it means I've rewritten everything around it to be really, REALLY correct and nice. But that's not much of a plus, really.
What a waste of a day. Sorry to those who tried to connect to the server and found they couldn't challenge themselves/eachother.
Still, from now on, the server should be up 24/7. Anything hits it, it should revivify automagically.
Now I'll work on getting the client to be equally rugged