Pastscapian. welcome, go to Applications/Disk Utility select your startup volume in the left hand column, then First Aid from the upper tabs and try Repairing Permissions first.
If that does not resolve the issue then boot up from your install DVD. After the installer loads select the English arrow and then Disk Utility from the Utilities menu. After Disk Utility loads select your OS X volume from the list on the left, click on the First Aid tab, then click on the Repair Disk button. If any error message are present (In red) run the repair again until no error messages are present. Restart the computer and see if this resolves the issue.
If not then an
Archve and Install seems to be the recommended cure all here for the many issues off this update.
Joe
Mac Pro 2.66 Ghz Mac OS X (10.4.10) Users (RAID 0), PM G4 (10.3.9, PM 6500 (10.2.8)