I have some render test pages and firefly's "draft mode" fails to render some polygons. Draft Mode also doesn't render some lights and refuses to render WorldZ. (Production Mode is okay.)

This image has 8 lights and a background, but half the lights aren't showing up, nor the background, nor parts of the dragons' wings. The dragon laying on the ground looks like his wings were shredded, but they're whole in the final, production mode render. The "P4" renders are just fine.