Comment Troubles?

A couple of people have reported that their comments are being rejected by the TypePad system. I have no idea why -- they are not being tagged as spam so I cannot restore them -- all I can recommend for now is to keep trying (some people send the rejected comments to me by email, and that will work if there aren't too many, but I won't always be able to post them right away).  I am looking into this. [I should probably add that not every missing comment is TypePad's doing...]