I think there is somne bug in Office 2007. If a document is password protected, then you are given the option of entering a password to open the file with write permissions or opening a Read only copy of the file. When I was using Office 2003, then opening a Read Only copy of a password protected document stored on a network share will not result in a lock being placed on the file. Another user can still open that file with write permission and edit it although others were viewing it in Read only mode. Any suggestions?