Most of the documents I post on the web are password protected to prevent editing or making changes only. They are not password protected for opening.
I have noted that the Windows Phone 7 will supposedly open such documents, but the resulting pages are blank. This is true if the PDF version of the file is anything new like 6 or more recent; possibly the problem goes back further. I haven’t checked except to note that a very old file produced as version 3 and which is protected for editing loads and displays fine.
Does anyone know if there are any plans to produce a new Acrobat Reader for the Win Phone 7 that will display files created with newer versions of Acrobat that have some password protection?