FedEx Web Services by Numinix Broken?

So, I'm guessing due to an update on the FedEx API, FedEx Web Services by Numinex is broken. I'm getting the following error:

PHP Fatal error: Undefined class constant 'ONE_DAY'

I'll be back at my office tomorrow to see if I can sort it out, but for now I have FedEx disabled on our website. This is mostly an FYI and to see if anyone has heard anything or experienced something similar.

What version of FedEx are you using on your site?