I have Adobe Acrobat Standard 9.
I have printed an email, word file, etc to PDF ensuring using 1.4 in Distiller.
I can open the file with Acrobat 5.0
However, if i make any editing, comments in the PDF file, when i save, it changes it to 1.6 therefore, it cannot be opened with Acrobat 5.0.
Therefore, i end up having a compatibility problem.
Thanks for any help you can provide