http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55954
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2013-01-12 05:06:43 UTC --- (In reply to comment #1) > I think it is really a bug in the mail clients if they don't just use > In-Reply-To instead. The reason why I say that is because some mail clients other things than just Re:. Some use the native language version instead like AW or SV. So again the mail client is broken and we really should not be working around broken mail clients if they cannot handle the case new is added to the subject.