Hi, I am having the same problems with the passwords being always rejected by gnome-screensaver. I have using a kerberos/ldap pam configuration. The regular logging works perfectly (so the system is ok), but you have to work non stop or kill you session (ctrl-alt-backspace) when you come back...
I would definitely consider this bug important, and maybe even release critical. I am willing to help on the troubleshooting. Feel free to contact me jacques
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