Acrobat Reader X security, comments disable

Question

Hello, we need to work with Acrobat Reader X. We generate a pdf from a doc file and we add security to disable printing and we enable commenting, but when we open it with Acrobat Reader X we see that printing is disabled, but commenting is disable too. ¿It's a bug from Acrobat Reader X? we know that Acrobat Reader XI resolve it but we can't see in realease notes.

Answer 1

We add security from java with itext library. Wirth user and password:
PdfStamper stamp = new PdfStamper(reader, out);
stamp.setEncryption("".getBytes(),"PASSWORD".getBytes(), (PdfWriter.ALLOW_MODIFY_ANNOTATIONS), true);
If we put "stamp.setEncryption("".getBytes(),"PASSWORD".getBytes(), (PdfWriter.ALLOW_PRINTING), true);" we can see PRINTING enable but it we put " stamp.setEncryption("".getBytes(),"PASSWORD".getBytes(), (PdfWriter.ALLOW_MODIFY_ANNOTATIONS), true);" is always disabled.
We use Acrobat Reader 10.1.3 .
I read some discussions like http://blogs.adobe.com/vikrant/2010/12/can-i-comment-on-pdfs-using-the-free-adobe-reader/ but i need an oficial release note where we can read the bug.
ACROBAT X.
ACROBAT XI.
I know that with Acrobat 11.0  the problem is resolved, I tried with 10.1.4, 10.1.5, 10.1.6, 10.1.7, 10.1.8 and 10.1.9. I can't find the list of release notes of Acrobat Reader 11.0.