Hi!
TC told me on another post that he includes KB938127 because it includes newer binaries than the ones already included with SP3, even if WU doesn't ask for it. Moreover, trying to install it on an already-SP3 windows, results in an error saying that "the service pack is newer than the update you're trying to install (or something like that)". I think it should be removed from the updates list.
Just my two cents.
bye!