Turns out to be a 64 bit problem. libselinux was using 32 bit int,
and
mctrans was expecting 64 bit int for size.
Fixed version will be in tonights rawhide, available now at
ftp://people.redhat.com/dwalsh/SELinux/Fedora
I confirm that mcstrans-0.1.4-1.ia64.rpm available at the above location solved
the problem on my Itanium workstation.
Many thanks,
Émeric