Interesting - I will check this out. I did find a couple of fonts that don't exhibit the problem, but dozens that do. I am a publisher and for some books, specific fonts are needed.
Also interesting that Inkscape has an option which solves this problem on any font.
I've read about the same problem with other programs, Illustrator, Corel Draw, Adobe, even Java. The solution is always to change the font joining setting from mitre to round or bevel, which seems to be a font handling setting common to the font libraries I guess. It would be nice if Scribus had this option.
Peter