A "dry" or "cold" solder joint is when the points being soldered did not heat up enough for the solder to properly flow between them and make good contact. I know there are at least two points of the LPC that tend to heat up more slowly when soldering, they probably have beefy traces that are acting as a heat sink. Don't recall which pins they are tho. It gets mentioned that solid solder joints look like shiny little volcanoes. The solder tapers down from the top (bottom?) of the pin to the LPC hole solder ring... the *entire* ring, all the way around. If your solder work looks like a blob or ball it is possible that it doesn't have a good connection. Use of solder flux helps to draw the solder in between points as well.
-Whoopin'
