Folks,

  I am now having problems with both Follow-ups, Replying and
Mail-forwarding - but only for particular messages.

  Here's a message that I can neither (R)eply to nor (F)ollow-up to,
although Mail-forwarding works for it....

  I'm including tracebacks (debug-on-quit) for (R)eply and (F)ollow-up. 

-jon