You also might try a couple things:Originally posted in cdnusers.org by cadpro2k
1) Turn on the Etch Boundry layers, and see if you can find these void areas and delete them
2) Find a coordinate that would allow you to move this shape completely off the board; move it, and regenerate the shapes; then move it back on the board and regen.
Either might also help you out. (I know, I've done it on some 11" round board I've had to ECO changes into, and they had GND fill on all layers in the open areas.