Freron MailMate

Using Version 1.7.2 (4025) and the Unread smart mailbox has a slight glitch:

If you have unread mail in more than one IMAP folder, and flip the |> indicator so you can see which folders have unread mail, then after you've read the last message in the second-to-last folder, the Smart Mailbox automatically collapses to a single "Unread" folder, losing the expanded folder view.

Example:

Unread:
3 Foo 2 Bar 8 Baz

If I select the Baz folder, and read all 8, then this turns to:

Unread:
3 Foo 2 Baz

I can now select either folder, say, Baz, and as soon as I read the last unread message in Baz, I'm left with:

Unread:

(I can't figure out the Markdown to make this appear correctly in this ticket; each item should be on its own line...)

No way to see Foo without re-clicking on Unread, which also loses the expanded folder view.

Minor glitch, but repeatable here.