Adobe 9 issues with forms in Acrobat Reader 7

Question

I've been reading up on this forum as to why the adobe rights are disabled after a user saves their data in Reader.  I have been adding form fields in Adobe Standard 9 then save the file,  test it in Reader, then Extend the Forms Fill-In for Adobe Reader and save the file with a slightly different name. The only usage rights that are allowed is to Save Form Data.  When I test the file in Reader 7, I can save the data but when I go into the document to make sure my data is there, I get that dreaded and popular message "Adobe Rights have changed and are no longer valid dialog box...
I never changed the original extended file to cause this..even when I don't add data but save to a new file anyway I lose the writable functionality.
A side note, I do not use LiveCycle and have been asked not to when creating these forms.
I did not have any problems with the forms that I had other people create and extend in Adobe Pro 8.  It seems to be a Standard 9 and Pro 9 problem.  Or, it could very well be me!
I use Reader 7 to test because these forms are for a volunteer organization and there are users on some early versions of Reader.  II do not use earlier versions of Reader.  This doesn't seem to be an issue in Reader 9.  I cannot vouch for Reader 8.
I just had one of my form writers take my form that was done in Standard 9 and Extend Forms Fill-In via Adobe Pro 8.  She initally received a message stating that the file appears to use a new format and it may not open or display correctly.  I then got that same message when opening the extended version of the file.  The document rights on the new form allow me to add comments and markup, a digital signature and save form data. Once I fill out the fields and try to save, also get another dialog box telling me that I need Adobe Standard or Professional to save (in this case it was 7 since I'm testing in Reader 7).
The forms that I am creating are initally PDFed by another party.  The orignal forms are created in QuarkXpress 4.1 and PDFed using Acrobat Distiller 4.0 for Macintosh.  I retrieve the files from a web site and save them to my hard drive to work on them.  They are shared via email.
Any help would be greatly appreciated.  I've spent the last week researching but no anwers to help me solve this particular issue with 9.

Answer 1

Interesting.  I did just do the Reduce File Size and extended the document and there were no dialog boxes when I saved my data.  The file size got larger instead of smaller and I received the message at the end of the Reduce File Size cycle that said " Enforcement of compatability to an earlier version of Acrobat has increased the size of some images".  There is an image in the file, not one that I added, but from the original document.  No change to the image either.  No biggie to me.  As long as my users can fill out the form and come back to it later to make changes, I'm happy!
Thank you.  I think that solved it!