Re: Changed criteria for deciding if articles have been read?

[Simon Josefsson <jas@extundo.com>]

Kai.Grossjohann@CS.Uni-Dortmund.DE (Kai Großjohann) writes:

> Lloyd Zusman <ljz@asfast.com> writes:
>
>> But in any case, given what I did with the .marks files to take care
>> of my problem, I don't believe that we need anything besides that to
>> help people in their transitions through the recent versions of Oort.
>> 
>> Or should there still be something else?
>
> FWIW, I didn't have to do anything at all.  Just upgraded my Gnus.

Lloyd's analysis is correct, but he points a potential problem: If you
use a Gnus version with .mrk/.marks, then downgrade Gnus to a older
version and read alot of mail, and then upgrade Gnus again, you will
lose those marks added when you used the old Gnus.  That is not nice.

But I wonder if up-down-up-grading isn't already considered harmful.
What happens if you downgrade Gnus, adds some articles to a nnfolder,
then upgrades to a Gnus that uses NOV nnfolders for instance?  There
might be other examples as well.  I remember many times when starting
old Emacsen and starting Gnus 5.3 (or something) which completely
destroyed my .newsrc.eld beyond repair..  (E.g the topics structure
was lost, I think.)