I migrated RTC to V3.0.1 and RDz to 8.0.3 on z/OS , and I am having problems with the load zFiles function.
I know there is a documentation error for configuration of FileAgentConfiguration.dat that could cause this problem,
but with this correction the problem is not fixed.
The Log message on RDz shows the follwing error:

!ENTRY com.ibm.teamz.zide.ui 4 4 2011-12-13 23:47:08.682
!MESSAGE CRHTC0301E:Invalid userid or password for server : https://testmvs:29443/ccm/. Check the FileAgent miner configuration file.
!STACK 0
java.lang.Exception: CRHTC0301E:Invalid userid or password for server : https://testmvs:29443/ccm/. Check the FileAgent miner configuration file.
at com.ibm.teamz.fileagent.miner.client.FileAgentService.loadFiles(Unknown Source)
at com.ibm.teamz.fileagent.miner.client.FileAgentSubsystem.loadFiles(Unknown Source)
at com.ibm.teamz.fileagent.miner.client.FileAgentLoadOperation.run(Unknown Source)
at com.ibm.teamz.zide.ui.wizards.LoadOperation.run(Unknown Source)
at com.ibm.teamz.zide.ui.actions.LoadzAction$2.run(Unknown Source)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(Unknown Source)

My FileAgentConfiguration.dat file looks like following:
https://testmvs:29443/ccm/,naga,/etc/jazz3/conf/password

All other functions are working Fine:

Build Request OK
WorkItems in general OK
Sharing projects is OK
Checkins, Delivery are OK