> the capacitors, filter out noise correct? Where else do you > need to do this? Two things I always do - (1) on the underside of the board a 10n ceramic and a 47u electrolytic across the Vdd and Vss pins and (2) connect the crystal case to Vss. This fixed strange behaviour in at least two circuits -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.