> Actually, there's no reset circuit.  /MCLR is set to I/O mode and the 
> only thing connected to it is Vpp on the ICSP header.  (However, if 
> capacitance is still a problem, it bears mentioning that this is a 
> solderless breadboard.)
> 
> Someone else mentioned that it might be a "use VPP first 
> program entry" 
> thing.  I can't test that theory yet because pk2 (the PICkit 2 driver 
> program on Linux) doesn't yet have a Vpp before Vdd setting.  I'm 
> working on getting a copy of Win2k on a spare machine to see 
> if this is 
> indeed the problem...

Using those settings Vpp-before-Vdd is probably needed. With the Windows
software that is not selected explicitly, so I am not sure that is
indeed the problem. What decoupling do you have on Vdd? Should be a
100nF near the target chip, and nothing more.

Wouter van Ooijen

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