Weird. It is not that way for me, and that is the first place I went to look for a setting.
Yes, the threads with new posts show at the top of the thread list, but when you click on a thread, the oldest (first) post is at the top. I want it like it used to be, with the posts sorted in reverse chron order (newest at the top). There used to be a setting for that.
I don't see anything that lets me change it. In my Preferences page, the sections are Style, Locale, Options, and Notices. None of the settings under any of them refer to the ordering of the posts in the threads.
Yeah, I've noticed that, that option is missing as well. Will forward to MRaburn. I'm not aware of an option in the new UI that allows you to select that.