SOLVED. Oops, by accident a group became a subgroup of another one. I should have scrolled down the page to see that.
This explains the entry in the CacheGroupMembers table. The UI could be made more intuitive: checkboxes should not be displayed for users inherited from subgroups. Or these users should not be displayed at all. Cheers, Thierry Thelliez _______________________________________________ http://lists.bestpractical.com/cgi-bin/mailman/listinfo/rt-users Community help: http://wiki.bestpractical.com Commercial support: [EMAIL PROTECTED] Discover RT's hidden secrets with RT Essentials from O'Reilly Media. Buy a copy at http://rtbook.bestpractical.com