>> Yes, the threading was (and is) on. I did try it both ways, >> though. Neither made a difference. > > I've fallen into this trap before, nice to hear you didn't - still odd > that the sorting didn't work as expected. > > > :-),
The thing is that the sorting *did* work. After some digging and studying the code, I came to believe that it was the .nnmaildir metadata that was messing things up. Pressing Enter on a group means "give me the first N articles". GNUS responds to this according to that metadata. So, once the wrong set of articles has been fetched, sorting that set still results in them being out of order from a user perspective. If this sounds confusing: let's say you fetch exactly two articles. The summary buffer has an article from today, and the second article is from last year. Now the user legitimately starts wondering where the more recent articles went. Thus the original title: "... articles disappear".
