As per the Redhat Virtualisation Expo yesterday... API/ABI compatibility is maintained within the point releases. If your stuff is certified on 5.4 it will run on 5.5/5.6. In addition there are compatibility libraries to get anything running on 5.X on 6.0... and when you move to 6.0 then anything running on 6.0 will run on 6.X. James _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos