Can Access Control Groups be nested? Can a group contain a group and if I do this will the CheckPersmission method work?
Jeff Williams From the JavaDoc for Group...You need to make sure that your implmentation of Acl.checkPermission() supports groups.
"Note that Group extends Principal. Thus, either a Principal or a Group can be passed as an argument to methods containing a Principal parameter. For example, you can add either a Principal or a Group to a Group object by calling the object's addMember method, passing it the Principal or Group."