Form glitches/Issues

Computer: Mac
OSX: 10.5.8
Software: Acrobat Pro 9.1.3
Fully licensed and registered

I've been working to get a fully compatible form to function properly for awhile now, but I still get complaints from clients that either cant fill in certain parts (usually the text parts but are fine with check boxes), or I cannot view the parts that were filled in with text (but can view the check boxes that were filled in).

Regarding the "cant view filled in text fields" issue, if I view the PDF in preview it seems to work.

I'm wondering what to do now, very frustrating. I suggested for those that have viewing issues to try an alternate PDF reader like Foxit, or OpenOffice for the time being but I need to solve this program once and for all.

Security:
Security is all systems go as well. I've played with the advanced settings in LiveCycle etc, nothing.

If you need more exact details lease let me know. I can backtrack, check settings, etc.

Thanks and let me know if it's a common issue to have compatibility issues across systems (older versions of Acrobat?!)

I'm happy to send the form over to anyone who wants to take a closer look. Thx.

Thanks!