Samir Saidani <saidani at squeakfr.org> writes:

> It seems that this change is involved in the problem. Hope this
> indication would help you to figure out what is the problem !

It seems likely that the messages already were in a different group
(or didn't have Message-IDs, or they were syntactically invalid), so
the mail-to-news script assigned new Message-IDs.  Which breaks
threading. 

-- 
(domestic pets only, the antidote for overdose, milk.)
  larsi at gnus.org * Lars Magne Ingebrigtsen