Maybe this is a duplicate of another repaint issue, but in this example, if one drags one of the images, parts of the window border/window decoration remains after moving the window, it does not properly update the screen as expected. Here is a screenshot: http://www.carto.net/neumann/webkitsvgbugs/screenshot_repaint_problem_Window.png - notice the artefacts after moving the "Navigation Window". Thanks for having a look at this.
This looks to be fixed the the latest sources.