Object appears jagged in final render? When I try to render a glass material, in rendered view it looks good, but when rendered, I get this wavy effect and black outlines. 




Polygon detail:



The scene is just a glass object with a glass material, background with a texture with a Diffuse shader and a lighting setup of two plane emissions.


Glass: 4 levels of subdivision surface modifier.
Background: 4 levels of subdivision surface modifier.
2 plane emissions, with no modifiers.
80 samples.


What is causing that and how can I fix it?

Here's the file if anybody wants to explore it.
The subsurf modifier on the glass object is disabled in the render.

Make sure the camera icon the subsurf modifier is selected: