This is most likely fixed in Beta 0.18, which is currently being verified by Unity as of yesterday.

I had uploaded SF with Unity 4.3, so it probably had 4.3 specific data in the scene that 4.2 couldn't load, hence the errors :)

Are you 100% sure you had per-pixel screen coords checked?
I can't reproduce this without unchecking it from what I can see

Actually, why am I asking you? I have both shaders. Just a sec

Haha, thanks <3

So I'm not seeing any major difference at the moment. Are you using * 2 - 1 after the screenpos in the SF shader?

I got it :)
(Also, the SSE code is rather messy, I thought it would be a bit cleaner)

Not that I can see, where did you send it to?

Strange - could you send me the compiled SSE .shader?

This is a pretty good idea, and I think it would be rather useful! It has to wait until after the 1.0 release though :)