I recently moved a project from a 16F876A to the 16F877A. Everything was bread boarded so I just pulled out the 876 and inserted the 877. The code ported over fine but now I'm having trouble getting the pic to reliably "boot." I have to turn the power on and off to the breadboard multiple times and then suddenly it will "boot."

I've check my code and I can't see anything that would do this. I've gone through and verified all the hardware connections and I don't see anything odd.

Thoughts? Things to check?