How to disable the warning:
This file may contain newer information than this viewer can support ...
I am using Adobe 5.0.5
I found that after checking the always checkobx, it'll go away. But on next reboot it comes back again. The Adobe is used on an unattended auto render server. This message box needs to be permanently disabled. thanks.
Or make sure the version of the PDF files send to the server is no higher than 1.4 PDF
AFAIK there is no other way to disable this warning.
EMEA Acrobat Technical Support