Thanks for the reply Vince.
Note that in my original post I should have said archiving, not
autoarchiving, although that's largely irrelevant.
I first tried archiving anything older than 1 July 2005 which should have
covered the imported mail from OE of 29 June 2005. It didn't work. Then I
tried again archiving everything older than 1 August 2005. It is then that I
realised all newly created mail created between 30 June 2005 and 1 August was
succesffully archived, but none of the 29 June emails or prior (ie those
emails imported from OE).
So now I'm in the unenviable position of having my Archive Folders contain
all mail between 30 June 2005 and 1 August 2005, and my Personal Folders
contain all other mail (ie. prior to 30 June and after 1 August).
It certainly seems like a massive bug in the software. It's a shame it
works on the modification date as this appears to be where the bug lies. If
you could choose to archive on Received date then the problem could be solved.
Any advice gladly received.