alexrj/Slic3r — pull request #95 by brad (2011-12-05 18:10:53+00:00)
Title: rename 5.5a -> 5.5b

It looks like you forgot to update the 5.5a page to refer to 5.5b.
The slic3r home page links to http://slic3r.org/2011/12/7-055b-is-out which doesn't exist.
I think this is probably what you wanted?
Just trying to help :)