If you have Print Server 3.0 and you run either the 3.0.2 or 3.0.3 patch, there will not be any code changes made to the print server; however, installing the patch will update the version number to 3.0.2 or 3.0.3 respectively. You effectively still have Print Server 3.0, meaning the code fixes in 3.0.1 are not present.
Installing the AppleShare 3.0.3 patch DOES NOT change the version number of the AppleShare Print Server. The version number on the Admin program and the File Server are upgraded but the Print Server is not changed.