Kerberos errors in 10.4.11

Server was working fine until recent updates, but started receiving these errors occasionally when students would login: Apr 20 14:23:23 servername DirectoryService[123]: GSSAPI Error: Miscellaneous failure (Server not found in Kerberos database) Apr 20 14:23:47 servername ipurge[26414]: DBERROR: reading /var/imap/db/skipstamp, assuming the worst: No such file or directory Apr 20 14:28:05 servername /usr/sbin/PasswordService: client response doesn't match what we generated The last line repeats a number of times. The other two messages only pop up periodically. The server is set to be ODM. G5 2x2.0 tower Tried changing a test group of users over to crypto for login type with no apparent effect. Considering going through these steps to troubleshoot it: 1.) Move to OpenDirectory to stand alone mode. 2.) Back up all files that matched /var/db/dslocal/nodes/Default/config/Kerberos/*.plist 3.) Delete all of the files that matched /var/db/dslocal/nodes/Default/config/Kerberos/*.plst 4.) Restart the server 5.) Promote OD to master Any other suggestions?