This question is an exact duplicate of:
I'm using Ubuntu 12.04 with 3d unity.
When I have several windows of the same application (say Nautilus) opened and I click on its launcher (in unity app launcher bar) window previews appear offering me to select which window I want to activate. But sometimes I can't recognize for sure which one I needed by those previews. So I'm clicking one of them. If wrong window is activated I'm clicking the launcher again, and trying next window. But then I found that those previews changed their positions (rotated). So I can't predict those window order to iterate them all without repetition.
I would like to disable that "windows preview rotation" feature.
Is it possible?