I'm having similar issues. Networked lab, installed the update on individual machines using a local admin account.
All the users login through a OS X Server machine, and each gets asked for the serial number. Changing permissions of the app's folder does not solve. Copying user prefs from one to another does not solve. Only manually entering the serial number at launch for each individual user solves.
I got the network dongle to avoid this. I have several hundred users. Logging in as each of them and entering a serial number is not fun. Telling all the users the serial number so they can do it themselves isn't really an option.
Any fix suggestion would be highly appreciated.
