Error: The renderer mentalRay is not registered yet.
This line suggests the mental ray plugin is not loaded. try unloading the MR plugin and reloading it. BTW do you by any chance have the vue plugin installed?
Worst Response To A Crisis:
From a readers' Q and A column in TV GUIDE: "If we get involved in a nuclear war, would the electromagnetic pulses from exploding bombs damage my videotapes?"