Subscribers should have received their issue in the post - please let us know if you haven't. For everyone else, the online version is now available for free download:
Try either setting the strokewidth to 0 or setting the strokecolour to be transparent (set the first two characters after the # to 0). Looking in the fontcolours.xml file for one of our projects, it looks like strokecolour="none" works, although it's not mentioned in the documentation.