I don't know if this is the same case, but Gerd showed me a migration failure that might be related. 2.0 seems OK, 2.1-rc0 is broken (and I've not found another working point in between yet).
The test case involves booting a fedora livecd (using an IDE CDROM device) and after the migration we're seeing squashfs errors and stuff gently falling apart. Dave -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK