I've already posted to the MusE mailing list for this one and I'm not sure if it's limited to GCC 4.3.1 or some other libraries. (glibc and libc e.t.c...)
However since updating gcc I can't compile MusE either the ~amd64 keyword version or svn version (keyword **).
Here's the error output, I don't imagine anyone can help with this one but just in case, anyone has an idea.