It looks like posts to current threads is messed up. I got about ten messages from the same person, similar subjects, but posted onto different threads.
I thought the guy was spamming the list, but when I checked the actual threads, his messages were not there. Worse: I hadn't received the actual messages.
It looks like the posts are going to the wrong thread? The thread is still marked as the most recently modified, but the messages are not there. When mail goes out the wrong message is being sent.
I know one other person got a similar batch of messages, so it isn't just me.
This is a new thread, so it should get out correctly.