Password protected document created in Acrobat XI (Mac) can't be opened by Reader XI (Windows)

I have a document that I created and password protected using Acrobat 11.0.2 (Mac).

I can open it with the same password using Reader 11.0.2 (Mac) but not Reader 11.0.2 (Windows).  On Windows I get an "invalid password" message.

Anyone else found this?