I owe many people some apologies: this site has been quietly eating your comments. There are filters set up to catch and discard spam comments, and they work very well. I’m getting thousand or so junk comments a week that are not making it through to be displayed.
Unfortunately, about a 5% of the junked comments are false positives. I’ve gone through and tried to restore the ones I could find, but that represents a far too substantial loss of blameless comments.
I’ve set up the comments section now to optionally allow TypeKey registration. I’m hoping that the software is smart enough to realize that if you’ve gone through TypeKey, you are not spamming, and that that will improve the accuracy of spam detection—so use it, if you don’t mind TypeKey. I might go further still and require TypeKey at some point; I suspect most people would rather jump through a few more hoops and have better reliability, than type something up and have the mysterious and ineffable spam filter decide to quietly shuffle your words off to the holding pen before erasing them a few days later.
Let me know any objections or suggestions you might have.