disappearing challenge

The guy who sent me the challenge barely speaks English. He said he's not sure how challenges work and says he may have cancelled it without realizing it. He doesn't know.
Just something to watch out for, in case a pattern emerges.
There ought to be a way fo quickly checking the logs to research things people say they did. This is a question of testability. One of the first things I do when I come into a company to help them with their test strategy is to review their logging systems. It makes a huge difference in the ability to investigate bugs.
(It seems that about a third of the time I post to a forum the post never posts... It's like the site has alzheimer's!)
I recieved a challenge notification in my email, today, from a player I was expecting to be challenged by. But when I logged in there was no game. It's as if the challenge was never offered.