Andrew Coppin
...it has been my general experience that almost everything obtained from Hackage fails miserably to compile under Windows. (IIRC, one package even used a Bash script as part of the build process!) I haven't seen similar problems on Linux. (But I don't use Linux very often.)
I try very hard to make my programs work on Windows; and indeed, one of things I appreciate about Haskell is how easy it is to create binaries and packages that are cross platform. However, the only time I actually use Windows is to build and test my Haskell packages. Most of the people on this list -- and I wager, most people on the mailing lists for any open source programming language -- are working on a NIXalike; we can work with bug reports, but we can't very well be the fabled "many eyeballs" on a platform we don't use. Ask not what your Haskell can do for you, but rather what you can do for your Haskell :)
About the worst problem there was Gtk2hs being confused about some Autoconfig stuff or something...
Well, what else would a package built with GNU toolchain be confused about? Is there some miraculous language and package system for it where compiling libraries made with autotools is just a snap on Windows? -- _jsn