What version of Acrobat are you using and what OS? Does the file have any security restrictions?
I use Windows 7 that purportedly allows the removal of any computer/personal information from any type of file - including the all important pdf files - following the procedure that I described in my original posting. The files will be publicly downloadable or emailed, and I do not want any user of any OS (Windows, Mac, Linux...) to see any of my computer/personal information for security reasons.
George asked what version of Acrobat you possess? If you do not have Acrobat we cannot help you. Acrobat has a method of removing all such information. In Acrobat XI, Protection->Sanitize should do what you wish.
I realize now that my Acrobat 9 does not have the 'Sanitize' feature. I have downloaded the trial version of Acrobat XI.
Thanks for the comments!