I am doing ground pours on both the top and bottom side of a two-sided board. The top side fill seems to work fine, but the pour on the bottom layer is leaving a bunch of odd shaped blank areas (see image on the left). I haven't routed any traces yet, so the bottom, which has no components, should be a solid blue.
The image on the right has both the top and bottom layers turned on. You can see the slightly darker red areas, that correspond to the blank areas on the bottom. Note these areas don't correspond to any features on the top layer, so it is not a matter of keep out or restrict areas.
I am using Eagle 7.5.0
Anyone know what is causing this?