[Haskell-cafe] base-3 -> base-4

Is there a "conversion guide" for switching from base-3 to base-4? I noticed that ghc-HEAD (6.13) comes with base-4.3 (and no base-3). This will break an awful lot of packages (?), in fact the breakage starts with cabal-install (since it depends on HTTP which depends on base-3). PS: I use gmane.org for posting, and they have these seemingly random "text captchas", and for this post, it reads "continuity"...