I never did get the funk out of the rancid tempera - but in an effort to resolve the situation, I called 1-800-Crayola. After giving them all of the batch numbers they're sending me a whole new box of bottles!!! Woo hoo!
I guess it never hurts to call the company.
If with new paint on the say, why does it pain me so to throw the other bottles away? (Yes, they are going in the dumpster).