Too late. We had a stable link, I used it, Google used it, blog posts were written that linked to it, I've emailed my wife links to it, I've put them in Word documents, I've posted them on internal intranets. You can't create a link, put content behind it, then move the content - it just breaks the whole web.
And incidentally, the _ghc_docs_ themselves continue to use these stable links to library docs, most of which are currently broken. All of the following links from documentation for ghc-6.12.1 give a 404 Not Found. (I do not claim the list is exhaustive.) from http://www.haskell.org/ghc/docs/latest/html/users_guide/packages.html section 4.8 links to http://www.haskell.org/ghc/docs/latest/html/libraries/Cabal/Distribution-Sim... section 4.8.8 links to http://www.haskell.org/ghc/docs/latest/html/libraries/Cabal/Distribution-Ins... %tInstalledPackageInfo http://www.haskell.org/ghc/docs/latest/html/libraries/Cabal/Distribution-Lic... :License from http://www.haskell.org/ghc/docs/latest/html/users_guide/using-concurrent.htm... section 4.12 links to http://www.haskell.org/ghc/docs/latest/html/libraries/base/Control-Concurren... from http://www.haskell.org/ghc/docs/latest/html/users_guide/primitives.html section 7.2 links to http://www.haskell.org/ghc/docs/latest/html/libraries/ghc-prim/GHC-Prim.html from http://www.haskell.org/ghc/docs/latest/html/users_guide/syntax-extns.html section 7.3.10 links to http://www.haskell.org/ghc/docs/latest/html/libraries/base/GHC-Exts.html from http://www.haskell.org/ghc/docs/latest/html/users_guide/arrow-notation.html section 7.10 links twice to http://www.haskell.org/ghc/docs/latest/html/libraries/base/Control-Arrow.htm... from http://www.haskell.org/ghc/docs/latest/html/users_guide/pragmas.html section 7.13.1 links to http://www.haskell.org/ghc/docs/latest/html/libraries/Cabal/Language-Haskell... from http://www.haskell.org/ghc/docs/latest/html/users_guide/special-ids.html section 7.15 links to http://www.haskell.org/ghc/docs/latest/html/libraries/ghc-prim/GHC-Prim.html from http://www.haskell.org/ghc/docs/latest/html/users_guide/lang-parallel.html section 7.18.1 links to http://www.haskell.org/ghc/docs/latest/html/libraries/base/Control-Concurren... section 7.18.2 links to http://www.haskell.org/ghc/docs/latest/html/libraries/stm/Control-Concurrent... section 7.18.4 links to http://www.haskell.org/ghc/docs/latest/html/libraries/parallel/Control-Paral... http://www.haskell.org/ghc/docs/latest/html/libraries/parallel/Control-Paral... from http://www.haskell.org/ghc/docs/latest/html/users_guide/ffi.html section 8 incorrectly links to http://www.haskell.org/ghc/docs/latest/html/libraries/base/Control-Concurren... where the real link ought to be http://www.haskell.org/ghc/docs/latest/html/libraries/base/Foreign.html from http://www.haskell.org/ghc/docs/latest/html/users_guide/ffi-ghc.html section 8.2.4.2 links to http://www.haskell.org/ghc/docs/latest/html/libraries/base/Control-Concurren... from http://www.haskell.org/ghc/docs/latest/html/users_guide/ghci-windows.html section 11.2 links to http://www.haskell.org/ghc/docs/latest/html/libraries/base/GHC-ConsoleHandle... Regards, Malcolm