Invisible Mail?

So I went to view my mail, because it said I had a new email, and when I click it mail shows up overhead, but my inbox etc. doesn't appear. I quit mail, reopen it, still no actual window. Hm, I click window, minimize, and the window appears in my dock, but disappears when I click on it. Weird?

 

Ah I actually had spaces disabled, but mail was in the second space, so for some reason it was in this second space that was turned off. I just removed it as being assigned to any space, and it came back instantly.

That needs to be fixed, me thinks?