My author link is using an obnoxiusly long Akismet ID instead of my username. Instead of using http://olowi.wordpress.com/author/vesq/ it uses http://olowi.wordpress.com/author/akismet-5658ab63338f501643676d51a8873714/.
This also breaks the widget that displays all authors and links to their posts, because the widget displays links with href of /author/vesq/.
It seems to be the same problem as described here: http://en.forums.wordpress.com/topic/author-link-url?replies=3
Blog url: http://olowi.wordpress.com/