I'm not good with the technical talk put in those Microsoft KnowledgeBase articles. All I know is that I'd rather patch something that couldn't have caused any harm in the first place, than getting problems and regretting I didn't install the patch (it took less than a minute)
Be careful with this one... For some reason this caused my SNMP service to stop 30 seconds after being restarted (on two boxes). Couldn't keep it running. I think it was related to the SNMP agent I installed that rides on top of the service, but I don't know for sure. I reinstalled the agent and everything seems to be working fine. Just be careful, and keep your eyes open.
I haven't encountered any problems, but I agree. Maybe making a backup, as they advise before you actually install the patch, isn't such a bad idea eh?