Hi Peter,

I have noticed that the PIC starts drawing current above 7 volts, even
with the clock stopped. At 8 volts output pins start moving away from
supply rails and the chip doesn't work so well, like the complementary
output transistor is starting to come on.

Have lost pins at 9 volts, and the chip stops, but works again at normal
voltages(without the pins that burned out).

I won't trouble you with the typical off-topic replies, you already got
many of those :-)

Cheers,
Bob