A perspective on "tweaks"

Here's an interesting perspective on all those little design tweaks that seem to some at the end of a project. As a programmer, these often drive me crazy. I suppose that I know the logic behind some of them, but have wondered at the logic of the "2 pixel move" for a page element. Perhaps designers should come up with techniques which would minimize the impact on a project and we programmers should be more tollerant of these clean up elements.