[Zope] LDAPUserFolder and Groups

Hi, I'm using LDAPUserFolder (version 2.0) with groups stored on my LDAP server. I changed the setting to "Groups not stored on LDAP server". When I checked the Groups-tab, the groups on the LDAP server were still there, but now they had object class "Zope Built-in Role". Before, they had object class groupOfNames. I could define new, locally stored, groups, but I could also use the LDAP groups. Is this normal behavior? Bert Vanderbauwhede... --- "There are some things money can buy. For everything else, there's Dungeons and Dragons."