So, the package `gvfs-fuse` is not installed on your amd64 machine? Could you please install `gvfs-fuse` (it's an official package and even supported by Canonical) and then repeat the tests (i.e. list directory .gvfs and test whether it works in nssbackup)?
So, the package `gvfs-fuse` is not installed on your amd64 machine? Could you please install `gvfs-fuse` (it's an official package and even supported by Canonical) and then repeat the tests (i.e. list directory .gvfs and test whether it works in nssbackup)?