A little late to the party... but for some reason DE was real loosey-goosey with their pad spacing. I've had several of their power supply boards eat themselves because of high-potential lines being a bit too close to other lines. Once the board scorches a little, it starts to conduct a little... then it burns more and starts conducting a little better. I thought it was just their power supplies... but I've recently had a PPB where J2 had 2 pads were arcing and kept taking out Q5. Had to get a little blade and scrape away the carbonization. There were no "real" connection between the 2 pads, but when I ohm'd it out it was @1.5K. After a scraped the carbon away, it went back to open. Worth checking out if this is still an issue...