I'm working (since too long) on a Haskell binding to the XFCE library "xfconf" because, you know, in order to improve one programming skills, one should write code. Anyway, after harassing the Haskell mailing-lists with my newbie questions, I got a not-so-bad working binding to xfconf.
… memory leaks apart.
It took me a lots of efforts to finally solve this memory issue, mainly because I'm a bad programmer who don't know a damn about software runtime and also because I don't know what tools to use with Haskell.