Dear Dr Edgar, I am member of the Debian-Med packaging team, that release binary packages of MUSCLE for the Debian operating system. Our archive was recently mass-rebuild with gcc-4.3, and muscle failed to build with the latest snapshot. You can find the error message on our bug report:
http://bugs.debian.org/462707 Please let us know if you need some help to resolve this issue or if you fixed it in an updated version. Have a nice day, -- Charles Plessy Debian-Med packaging team http://www.debian.org/devel/debian-med/ WakÅ, Saitama, Japan