I produce many SVG graphics in R, mostly fairly simple scatter and line plots. I generate them using the ggplot2 package and save them in the SVG format with the ggsave function. The graphics display correctly in the Mac Finder's preview pane and in a web browser, but when opened in Designer, all line elements (plot axes, tick marks, bar and point borders, etc.) have their stroke set to 'None'. Text renders correctly but I have to select each line element in the Layers pane and set the stroke to the correct value. This of course is tedious and time consuming. Any ideas as to why this is happening?