Hi Haskell Cafe, I have some code that compiles when running on GHC on OS X, but not on Ubuntu: No instance for (hashable-1.2.1.0:Data.Hashable.Class.GHashable (GHC.Generics.Rep Point)) arising from a use of `hashable-1.2.1.0:Data.Hashable.Class.$gdmhashWithSalt' Possible fix: add an instance declaration for (hashable-1.2.1.0:Data.Hashable.Class.GHashable (GHC.Generics.Rep Point)) In the expression: (hashable-1.2.1.0:Data.Hashable.Class.$gdmhashWithSalt) In an equation for `hashWithSalt': hashWithSalt = (hashable-1.2.1.0:Data.Hashable.Class.$gdmhashWithSalt) In the instance declaration for `Hashable Point' Anyone know what's happening here? Cheers, -John -- <http://www.gocatch.com/> Sydney, Australia <https://www.facebook.com/goCatch> <https://twitter.com/gocatchapp> <http://www.linkedin.com/company/goCatch> <https://itunes.apple.com/au/app/gocatch/id444439909?mt=8> <https://play.google.com/store/apps/details?id=com.gocatchapp.goCatch&hl=en> <http://www.windowsphone.com/en-au/store/app/gocatch/d76b0eb5-bad6-429f-b99e-0ce85d953f93> <http://appworld.blackberry.com/webstore/content/31917887/>