I was wondering if the on-disk data format for btrfs is compatible between the i386 and amd64 code bases-- e.g. would you expect to be able to swap data drives between machines running either? I've got an old i386 installation with /home in it's own partition, and I'm wondering if I can expect to just unlink /home and install a new amd64 version, and then link in the home parition again.