I've just checked the nsd.tcl file and apparently the jendy user is not even specified there. I may be confused on this point. It was early this summer when I installed ACS - and it seems like ages ago. The service name is jendy and the tablespace where most of the ACS data resides is called jendy, and there is a jendy user in Oracle, so I just assumed that jendy was the user that was connecting through AOLServer.
Would you know which user I should be granting the dba privilege to on this alternate tablespace? It wouldn't be nsadmin would it?