check_esx3 error "Permission to perform this operation was denied"

Today I was setting up VMware vSphere Hypervisor (ESXi 5.0) on a new server. Since I'm on the Kool-aid, the first thing I do when setting up a server is getting some kind of Nagios monitoring going. For several years, on ESXi servers, I have been using op5's check_esx3 plugin. Today was the first time I had set up an ESXi 5.0 server though, and when I first ran it after creating my Nagios user in ESXi I got the following error:

Permission to perform this operation was denied

VMware ESXi Configuration File Encoding Error

   Today I had an error while trying to start up a VM on VMware ESXi 4.0 in the vSphere client after moving it from an ESXi 3.5 server with the VMware converter. This is how I fixed it. I put it here in the hopes it will help someone else.