Well, I'm on an Ubuntu amd64 system (I'll install a Debian amd64 system if necessary to poke at this), but I grabbed the Debian FoF package and the Ubuntu FoF package, and neither of them gave me this error.
A quick round of searching informs me that this error crops up when your libGL isn't where it's expected to be - I think this means that A) you need to install something, and B) the FoF package needs a dependency on whatever the libGL metapackage is. Do you have direct rendering/3D acceleration working in other things? - Rich -- BOFH excuse #84: Someone is standing on the ethernet cable, causing a kink in the cable
