It seems like today (at least in bzr 1.2 and 1.3rc1 problem exists) upgrade to rich-root/rich-root-packs format is completely broken. https://bugs.launchpad.net/bugs/177874 https://bugs.launchpad.net/bzr/+bug/202884 https://bugs.launchpad.net/bzr/+bug/203607 I'm inclined to mark these bugs as critical. What core guys think about it?