Thomas Bereknyei are currently re-writing fgl (just about completely from scratch) and we plan to make an initial release to get feedback on the API in the next few weeks. However, I'm sending this email out now to warn people that I highly doubt any code that was written for the current version of fgl (http://hackage.haskell.org/package/fgl-5.4.2.2) will work with the new version. As such, if your code uses fgl you should ensure that the specification of the package in your .cabal file has an explicit upper bound (or indeed just set "fgl == 5.4.2.2") to avoid any problems when we release 6.0.0.0 (we're trying to avoid the problems that plagued KDE-4 by not claiming in the slightest that the initial few versions are intended for end users). I have already directly emailed the maintainers of any and all packages I could find on Hackage (using Roel van Dijk's wonderful reverse-dependency mirror at http://bifunctor.homelinux.net/~roel/hackage/packages/hackage.html), but just in case I've missed one or there's an as-yet-unreleased package somewhere in the works, here is the official "heads up". -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com