Downgrading is not part of the normal workflow. You can do it using apt pinning by example. Your patch is not correct, there is no reason to register all the schemas on gconf installation, all the packages shipping a schemas register it themself
-- Configuration editor reports that no schema can be found since latest dapper updates https://launchpad.net/bugs/50150 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
