Comment 1 for bug 1170297

So, to clarify the problem a bit, I should add that with all layers visible, the autorouter will default to the Signal 1 layer, and will not use Vias even with the vias layer visible. If I disable all but the Component, Solder and GND layers, the autorouter will route only on the GND layer. I can then Shift-M the traces up to the desired layer. Obviously, this won't work.

I haven't tried Autoroute All Rats to see if the bug is isolated to Autoroute Selected Rats, but that's because the PCB I'm routing is very complex and I can see that taking hours. I'm attempting to only autoroute a very small section of my layout.