Pointfree and -XRank2Types don't mix in X.L.Groups.Helpers
Pointfree and -XRank2Types don't mix in X.L.Groups.Helpers

It used to work with ghc-6.12 (and earlier?), but ghc-7RC2 type inference
doesn't work with . instead of it's definition.
MasseR/xmonadcontrib,MasseR/xmonadcontrib