The Nebula has some of those issues, but I am glad you guys know what the issues are. DX9 hides the issue, DX11 reveals the triangles. It also messes with the transwarp gates.

I made a gallery with DX9 vs DX11 shots of the Nebula -- it's dark but you can see the triangles.

http://www.jediknight.com/gallery2/v/STOgraphic/

I hope those pictures help out some.

Thanks!