After updating to Mac OS X 10.5.7, a user may not be able to log in to a managed client workstation. On startup, or after entering the user name and password, the user may be prompted for an administrator name and password, but nothing can be entered.
This issue can occur on PowerPC-based Macs if the file /etc/authorization is not updated correctly when installing the Mac OS X 10.5.7 Update.
In Mac OS X 10.5.7 or later, access to add or delete network printers on a client computer is controlled by membership in the lpadmin group. You can control the ability of managed user accounts to add and delete printers by controlling the membership of this group.
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