Our spam filter seems to be trapping legit comments from time to time. What they seem to have in common is that they are all pretty lengthy. I don't know if that's the cause, but I will try to check the spam trap more often and release anything caught up in there. There's some from a week or more ago that I didn't release because those threads are largely quiet, but I did let some out from the last couple of days.
Thanks for your patience.