Andrew Kieran wrote:
> Have I run into a bug or did I miss something that is or should
> have been glaringly obvious?  Interestingly, it works if I
> change PORTA/TRISA to PORTD/TRISD.

Maybe you have to set PORTA shared pins to Digital, i.e. disable the A/D 
which is active by default on those pins.
Take a look at register ADSEL/ADCON...

-- 
Ciao, Dario
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