Version: (using Devel) Installed from: Compiled sources OS: Linux In the zoomed out view, moving around the desktops is very slow (to the point where anyone using it probably wouldn't like it). I believe it has something to do with the drawing of the pixmap background. If the view is trying to be smart, it is probably clipping the redraw area to the visible region. However, when panning this is bad, because panning is faster when you've drawn the whole image already and you only reposition the full image into view (no real redrawing). This is probably what is killing the performance of the movement, as a default view will likely try to only draw the minimum amount.
in 4.1 it's much, much smoother than it was in 4.0. i used to be able to reproduce this problem quite easily (e.g. every time i zoomed out ;) but no longer have problems with it.