Seems that a little lm_sensors/net-snmp bug has bit me on the new Argo. Well, it might've been there before but I forgot about it. Anyway, according to Red Hat bug#150199, net-snmp is supposed to be pushed out with the next release with a fix; but that was 3.5 months ago. Guess I need to add a comment to this bug to see if I can get the ball rolling again; we've already seen an update since this bug was supposedly "fixed", but no new version. Guess that's what you get for using a slow-release-cycle distribution.