(Imported from Trac #907, reported by LeventErkok on 2011-12-22)
The bug http://hackage.haskell.org/trac/hackage/ticket/656 is impacting several packages from being correctly installed on the hackage web site. Given this bug was fixed about 5 months ago, and the last cabal-install release was about 6 months ago (Mar 9th, 2011), it sounds like a new release would help move things along.
This is per the discussion here: http://www.haskell.org/pipermail/cabal-devel/2011-December/007964.html
It's been released.