the Posted by link for the blog module doesn't link anywhere. Or It doesn't have any link does it?. Are you looking at the standard blog entries? What theme are you using? Basically it should be coming from blog/templates/Includes/BlogSummary.ss
Ok so thats a bug with the theme. I think the place where you need to edit the link would be themes/higherground_blog/templates/Includes/BlogSummary.ss but I haven't looked at the template just where it should be.