Ahha! that would do it. Yes Gerrits fix was to prefer the pre-scaled images. to save the cost of rendering svgs to side. So if there isn't a pre-scaled icon you don't get the benefit.

As far as compiling goes, I largely followed the instructions Gerrit added to the navit wiki : http://wiki.navit-project.org/index....t_on_n770/n800

That said at this point I've re-installed my whole scratchbox environment at least once! ;-)
what sort of problems are you having?