Hi, As part of the Curriki development, since Curriki is growing big (more than 60000 users), the XWiki.XWikiAllGroup is not scalable and this can lead to bad things. I've proposed a patch to make XWiki.XWikiAllGroup implicit. We have tested it and this seems to work well (see http://jira.xwiki.org/jira/browse/CURRIKI-738 for the patch). The only issue I see is the fact that once you have activated this, the counter of number of users for the group all group in the administration and the ability to edit the group makes no sense. Finally the adding the the AllGroup in registration has not yet been deactivated which would be necessary to make the registration not be impacted by the number of users. The Curriki team would like to see this patch make it in the XWiki Core. WDYT ? Ludovic -- Ludovic Dubost Blog: http://blog.ludovic.org/ XWiki: http://www.xwiki.com Skype: ldubost GTalk: ldubost