Something is afoot, but I'm not sure what. DMo made some adjustments to user groups, but I think it triggered something else. Many newer members' posts are being flagged to be moderated, i.e. they don't show up until a mod clears it. Any posts you have in a thread that was started by a moderated member may not be showing up.
That's my theory, anyway. I'm hoping DMo pops his head in here sooner or later... he's had his hands full in RL lately.