Joe, I just noticed the new post. What you have is the same debris I had from hand soldered joints, they have not cleaned off the flux. I dont think it is anything leaking from the capacitor. On mine the hand soldered interboard connector cables has the flux debris on several of them, I think it has simply formed a conductive bridge and depending on the location different faults will appear. Having said that although the problem reappeared on mine, it has been OK for several months now.
Become an expert on fluxes (but dont mention it when out drinking!)
http://www.residues.com/faqs_fluxes.html