Found out something mildly amusing today.
Apparently nobody has bothered building anything from the xlibs or xserver trees on an AMD64 system yet.
These modules contain such gems as:
# if defined(__AMD64__) || defined(AMD64)
Which doesn't actually *work* on these machines, as gcc defines __amd64__ and not AMD64. (Yeah, kids, case matters.)
Daniel added me back to the xlibs and xserver groups, so I should be able to commit some fixes for this stuff; however, there are still a lot of other issues on AMD64 that haven't been fixed yet. ::sigh::