Several people have said they have had difficulties with comments.  I don't know if it is a real problem, or if it is just that I was gone on Sunday and a bunch of stuff piled up in the moderation queue  (any comment with multiple links goes to a moderation hold for me manually to check for spam).  I will look in to things.

Update: Several comments on the post about police and photography creepily were sent straight past moderation into spam.  I have recovered them.