For the Erc, only a few errors come up, the only important ones are POWER PIN IC2 VS connected to V+ and POWER PIN IC5 V+ connected to N$26, both of which look correct in the schematic. The other errors are complaining that something is unnamed or doesn't have a value.OK, do this:
1) Open up the schematic in Eagle, and do an Erc (error check). Does anything show up?
2) Open up the board in Eagle, and do a Drc (Design Rule Check). This should give warnings if you have things routed too close to each other or overlapping.
The Drc is a little more scary, however. I come up with 270 errors, all but one are stop mask errors - these ones don't look too harmful, and the layer that they're on was necessary to make the PCB. The final error complains about the width of the copper pour I put on the bottom, but not the whole thing, just a single line that's near the edge of the PCB. I dismissed it because I thought it was an error in eagle, like when it complains that a part is missing a name.
I've since gone over the top part of the board - I can't see anything from above the components. I'll have to breadboard the circuit and hope that the problems go away.