Haddock version 0.5 is released. Get it from here: http://www.haskell.org/haddock Not a great deal has changed from version 0.4, but you need the new version if you want to build it using recent versions of GHC. Also, several bugs have been fixed. This is the version of Haddock that we are using to generate docs for the hierarchical libraries that come with GHC. Cheers, Simon