It appears that newer messages now posted by Admin/Reviewers can not be deleted by the cache owner. When attempting to do so, you receive this message:
Sorry. You can't delete this log.
Here is my problem with this… I had a cache where the log went to mush so I disabled it so I wouldn’t hear any more complaints about it. Due to the snowy weather, being busy, etc. I did not get to it for a month so a reviewer posted a note. I had no idea it would get archived since I didn’t reply (and I always thought I would be able to get to it soon) but it did get archived. I got it un-archived and then I replaced the container, log, etc. to get the whole thing back online. My point is there were several Admin/Reviewers logs in all this correspondence on the cache page that just made a lot of noise for future finders so I deleted them all (who cares about all these problems as people read through logs for hints, etc.). If anything like this happens in the future, I won’t be able to delete them which really annoys me!