Screen Saver Password

My managed preference for Require Password to Wake From Screen Saver is no longer working on my 10.4 clients. It seems to have been ‘broken’ during one of the 10.4 security updates, although I’m not certain of this. I have com.apple.screensaver set up in WGM to askforpassword. On my clients I can delete all files in /library/managed preferences/username. When the client logs back in, new copies of the plists are copied into this directory, but the settings are not taking effect. There must be some other plist files to delete in order for these preferences to work again. Any thoughts? I’ve also tried renaming the ByHost files using a script from bombich. The script correctly renames the files but the settings do not take effect after this either.