I'm using WPSEO 1.4.4 with a multisite blog. I'm noticing that every blog name in the multisite is missing the trailing slash in the breadcrumb. So a breadcrumb will look like this if you add a prefix for home page too:
Home > Blog Name > Page Name
Blog Name: home.com/blog
Page Name home.com/blog/page-name/
Home shouldn't require the trailing slash. But the blog name certainly does. Using the "enforce trailing slash" option didn't work for me either as it seems to only apply to the end of page urls, not the breadcrumbs.