Last modified: 2010-10-24 15:24:33 UTC
When I add a single $wgRevokePermissions['noc']['edit'] = true; in LocalSettings.php, nothing appears on Special:UserGroupRights, unless another $wgGroupPermissions['noc']['createpage'] = true; is added. However, no matter whether $wgGroupPermissions exists, Special:UserRights can list the new user group correctly.
Fixed in r75313.