Comment 1 for bug 266341

I've browsed the mailman source code a bit and I found
some suspicious code
in /trunk/mailman/Mailman/Handlers/Decorate.py. If the
list admin specifies a header or footer to be added to
outgoing messages, then the content-type header is zapped
and then regenerated from just the charset info, i.e. the
format=flowed parameter is lost.