Hello Nicholas Boel!

 AA>> Sypheed 3.2.0 here, BTW.

 NB> Sorry, I didn't pay enough attention. It looks like you're using Tommi's
 NB> NNTP server. If so, he would have to make that change to his server's
 NB> configuration file. :)

I failed to mention.. that I see Sylpheed changing the subject  
by adding the "Re: " to the subject.  So, Sylpheed must be the  
cause.

-- 
  ../|ug

--- OpenXP 5.0.58