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I was just finishing up step 4 in the sammichSID assembly instructions and I'm running into a problem I want to fix before I get any further. On step 4.19, I am to check for shorts between all the voltage regulator pads. Everything seems to check out except the middle pin of my 7809 (should be ground) and the pin closest to the edge of the PCB. For some reason this connection is giving intermittent beeps when I test for continuity with my multimeter. I can't seem to reproduce it consistently, and 95% of the time it's fine, but that little beep every once in awhile has me worried enough to pause. My soldering skills are beginner, but there's no visible mistake I can see. No obvious shorts, the joints look OK.... Could I have fried a component somehow?....would that even cause a short? Checking some surrounding joints, I'm actually getting the same issue with the next nearest joint as well, one of the leads of C9. Ivette Reid redoing each of these joints with no change.... I'm afraid of doing more harm than good at this point; frying something trying to fix a joint that might not even be bad. Any ideas?