Comment 4 for bug 270031

There's literally no difference between an amd64 and i386 PPA buildd except that the chroot contains either amd64 or i386 binaries. They run the same kernels, the same software, etc.

If mono is segfaulting on amd64 only, and not i386, then it's a problem with mono on amd64, and not a "buildd problem", and can just as readily be diagnosed in a clean amd64 chroot on an end user's machine.