There were previously a few thousand older ROS packages which weren't being indexed because they were referenced by old (read: bad) svn repo checkout URIs. This has now been fixed, and now there are many more older repositories from ROS Fuerte and ROS Electric in the index.

A new Errors Page also now shows errors encountered while indexing. If you expect to see something in the index and it isn't there, this page might shed some light on it.