If you use the move node tool to try and move the 'outline' you will discover that the polygon is the line. It's obediently filling with any fill you give it. There's just nothing in the middle.

How did you create the landmass?

Something else pretty weird from my point of view. The map seems to have no template - no drawing tools and no fills. All I get is red Xs.

I will always be working on another annual, Remy. It's my natural state :)

Its when you get to cackling hysterically at the mess you're in trying to spin a Blender terrain the same way you would a Gaea terrain that you know it's time to take a break.

But I am working on the November annual! ;)

I come up for air every now and then...

@Wyvern - I think Remy is working on just that ;)