Why are filled fields blank when opening in Macs?

Question

I can create a form in Acrobat, fill in the fields, enable it for Reader, put it online for downloading, and they view fine on a PC in the browser. However, when opened in Macs or the iPhone, the fields are blank. Anything special I should tell the customers so it works on a Mac? Right now I'm not sure what app they're using to view them.
Thanks,
Steve H

Answer 1

I just did a quick test. I opened the file in Acrobat. Reader, and Preview on the Mac. They all showed the field contents when initially viewed. When I made a change to a field in Preview and saved the file, the field contents do not display when subsequently opened in Acrobat/Reader. This is a well know bug in Preview. In short, Preview corrupts the fields, making the contents not visible. This can be partially corrected by exporting the form data to a file and reimporting, but is does not undo all damage. It does make the data visible, however. You can also run a script to effectively do the same thing.
What you should tell folks is not to use Preview to make changes. Instead, use Acrobat. Reader can make changes and then save the modified document if you apply usage rights to the document with Acrobat: Advanced > Extend Features In Adobe Reader...