We’ve tried to keep a reasonable compromise between security and convenience, between automatically rejecting too many comments or approving too much spam. At this it seems we have failed (well, I should say I have, given I made the choices on spam protection). Henceforth we’re deploying a new solution in that regard. If, in the past, your comments were not posted successfully, I apologise, and hope that it won’t happen again in future.
Spam is a pretty difficult problem, and we haven’t found a perfect way to solve it while maintaining the independence of our website and not relying on third parties to hold your personal information and our data. I’m hoping this change will take us to a slightly better local maximum, if not to the promise land.