A couple of issues here, both with a 18F1320. It appears that it is running super slow. The LCD is displaying gibberish and a flashing LED is taking hundreds of times longer to flash on and off. All settings are correct. Resonator is correct.

I have no idea.

Couple of days after this, another 1320 came back with the same problem. I've programmed hundreds with the same code, and very few have come back, and only these two have this symptom. The others were for other areas of the power supply failing.
I can reprogram these PIC's and get exactly the same results. I replaced all support components on each pcb but it is actually the PIC that's failing.

So has anyone else seen failures of this nature? Did you figure it out? On both these boards, I replaced the PIC and the boards ran fine.