I think this is a wordpress problem. Let me if I can get you some htaccess to fix that up.

Okay, I have no idea how to make a url rewrite from author/authorname to index.php?author=authorid#.

However, there's a new issue if someone tries to find posts from an author id that doesn't exist.
http://wiflba.com/index.php?author=44 Visible there.

Maybe you'd want to change your permalink structure, or change the author links to link to the direct author id? Even though it should, http://opentray.com/?author=1 doesn't redirect to a different link, so your permalink structure doesn't seem to support rewriting author pages.

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