...Basically the build process is supposed to run a kde app that converts svgs to the prescaled pngs. However I have not managed to get it installed under scratchbox in my ubuntu install. There is a similar app that I believe Gerrit uses to 'fake' this step, but it just segfaults for me. Anyway...basically Gerrit has providees the icons-prescaled.gz which you can extract in the navit/xpm folder either after installing a build that didn't have them. Or (in my case) in the source folder before building the deb in the first place. This then means all the icons work again. ...