I have a few 4.1 and 4.1u1 hosts, today for the first time I used the patch to bring one from 4.1->4.1u1 instead of freshly installing and the oem.tgz got populated with *some* of the contents from the original and what looks like to be the cnotents of the patch changes wrt the new drivers etc.
Is this normal for a patch update versus a fresh install?