Updating the priority seemed to do the trick. The job ran on time this morning.
Another factor that I'm sure contributed is that we didn't realize our CPU was pegged for a couple days and had to restart Mango to clear that up. (Different post created for that issue...)
@craigweb
I did not enable SSL. I have the same problem in Debian and Mac.
But why would beta 4.0.3 work but not 4.0.5 when installed in the same environment? I have tried fresh installed as well but no luck for both Debian and Mac.
It baffles me.