I've discovered a problem with TypePad's new commenting platform (TypePad Connect) that those who comment need to be aware of.
If you look at my three comments in reply to the troll on this post, let me inform you that I composed that as a single comment and could not get it to post no matter what (via email, directly on the form, with Safari, Firefox, IE; Mac or PC). Nothing worked. And, what happens is that when you post, the comment just goes away. No error with a return to your compose screen. Nothing. So, if you haven't saved what you've written, it could be lost.
The way I got it all up there was to break it into three parts, and that worked. So, that suggests the problem is with the length -- fabulous news for those who put the most effort into adding value to a post.
So, if this has happened to you, I'm dreadfully sorry. I have alerted TypePad and will keep on them. What I suggest is that when you compose a comment, select the text and copy into your clipboard. For added safety, a good method is to paste it into an email and email to yourself so you've at least preserved your work. I have no idea what length causes this blowup, so you'll just have to work that out each time; but if you're preserved your work you should be able to accomplish it.
Later: Please let me know via email (list on my about page) if you experience any issues with comments.
More Later: I believe I have found the issue (have alerted TypePad). It seems that if your comment has up to four URLs, no problem. If you have five or six URLs (and presumably more, but I only tested five and six), it blow up, doesn't post, and worse, you lose your work unless you've saved it elsewhere. This is probably not an issue for most, as it's rare to put that many URLs in a comment anyway. Just something to be aware of until rectified by TypePad.