[xwiki-users] Active directory + multiple group_mapping = strange behaviour

Hi, I'm using XWiki Enterprise v1.7 under Windows 2003 and Oracle Database I set up 2 AD groups that map to the same XWiki group : xwiki.authentication.ldap.group_mapping=XWiki.MyXWikiGroup=cn=ADGroup1,ou=Site,dc=company,dc=comI\ XWiki.MyGroup=cn=ADGroup2,ou=Site,dc=company,dc=com Users that belong to MyXWikiGroup are able to EDIT a space, all others can't. As long as a user from ADGroup2 is logged and visit the space, user's permissions can't stop swapping from "able to edit" and "not able to edit" the space. I took a look on the group changes history and it seems that a change is performed 10 times a minute. After one hour of connection the history reached the version number 700+ I search through the mailing-list archives but I didn't see any things similar. Any ideas ? David