unchecking junk mailbox in preferences and rule in preferences mysteriously reverts

Posted here because this happened after upgrading to Mountain Lion.

Two things keep happening.

  1. The SpamSieve Rule disappears after quitting Mail (and my other times as well)

  2. The unchecked “Junk” preference box reappears checked in preferences.

Stymied,

Ed

It sounds like Mail is unable to save your changes to disk. It might help to use Disk Utility to repair the permissions, or to look in the All Messages section of Console to see whether any errors are reported.