[resolved] Sorting problem with empty inbox folder

[miseryshining]

excerpt from this post.

The problem occurs if your main inbox is empty, but you have some mails in other folders. It's because RC enables sorting when it displays the folder list, not upon switching between folders nor after the number of messages in current folder changes (for example due to deletion).

the fix is already in there, it has worked for me for every new RC release since about a year ago.