I have the same problem:
I am using the latest graphicscarddrivers. But anyways the problem seems to depend on the graphicscard. I am using a 8800gts.
In some cases the problem happens nearly never but when for example looking into particles it is very heavy. Independent of viewmovement:
On this screenshots you can somehow see a small copy of the view in the streches. But this could probably also be the view for the refraction, but I don´t know...
If needed, I could send you that project, though it is really bad coded (at least in terms of readability...). I doubt that these problems are caused by failures in the shaders.