It appears that if the following sequence occurs, then it is not possible to upgrade a 5.2 Agent to 6.0
1. Client starts with Win XP SP2
2. CSA Agent 5.2 is installed
3. Client is upgraded to Win XP SP3
4. MC is upgraded to 6.0. At this point, when the client is added to the upgrade group, it never gets upgraded.
Has anyone else encountered this problem?