I have a bunch of .eml files that contain the message part encoded as
Content-Type: text/rtf Content-Transfer-Encoding: base64 Content-Disposition: inline
Up to OS X Lion, Mail and Quick View both happily displayed the message.
The new Mail 6.0 included in Mountain Lion seems to ignore this part of the message and shows only a blank sheet (same for Quick View, of course).
Any ideas if that is intended or a bug and how I could resolve this?