we have a pdf document that has been "marked up" with sticky notes, pencil marks and text boxes by two users, user1 and user2. The commenters (those two users who did the "marking up") did not lock their comments. User1 and User2 were using acrobat 8 standard. When the document was forwarded to the third user, the comments icon in comment view have a small padlock symbol on their respective icon, see inserted image. Due to privacy considerations, I have redacted the names on the document. When the properties sheet is opened for any of these comments, the locked checkbox is NOT checked. However the comment CANNOT be changed or deleted.
Any ideas/suggestions/hints will be greatly appreciated.