Re: accessibility supported questions

Seems like your are testing the screen reader's support of the form, not 
the form itself.  Did you report your inconsistencies to the developers of 
the screen reader? 

If your goal is to test 4.1.2 
http://www.w3.org/WAI/WCAG20/quickref/#qr-ensure-compat-rsv on PDF forms, 
then you need to understand how a PDF programmatically sets the name, 
role, state, etc.  Maybe inspect the tags?  That the particular screen 
reader is or isn't picking up the information correctly or consistently is 
a screen reader bug, not a PDF Forms compliance issue. 

Regards,
Phill Jenkins, 
IBM Research - Human Ability & Accessibility Center
http://www.ibm.com/able
U.S. Access Board
http://www.access-board.gov/