Eagle is refusing to tie ground pads of SMD components to the ground plane
So, this seems like a silly thing, but apparently if you have something in the Dimension layer (which is where I drew the actual component), Eagle thinks it needs to be routed around.  The problem was solved by pushing everything into the tPlace layer.  Not ideal since I don't want component dimensions mixed with my courtyards, but I can figure out a way around that, ideally.