Problems with tiling shader in 2D

[teenangst]

I have set up a repository that has a working 3D tiling example but a non-working 2D example https://github.com/teenangst/tiling_textures

Things are identical between them except for size (I included a blank white mesh above where the tiling should appear in the 2D with the only difference being that uses a ColorMaterial) and the fact that 3D uses a 3D camera and 2D uses a 2D camera.

I would really appreciate assistance, please do fork and make a pull request if you know or think you know what mistake I've made is. My head is bleeding from how much I've been slamming it into my desk out of frustration today.