When I attach an Acrobat 6.0 file to an e-mail and send it from a
Windows machine to a MAC, the attachment indicates it is there, but
if you click to open it, Acrobat opens but there is nothing there.
SOMETIMES you can save the file and open it separately in Acrobat
or Reader, but generally it just isn't there. This happens with
multiple users (newspaper offices), from PC to PC all works fine.