If you try to clone a Virtualbox VM with a newer version of Suse Linux the machine will no longer boot afterwards. You will get error messages like
Trying manual resume from
resume device dev/disk/by-id/ata-...-part1 not found (ignoring)
Waiting for device dev/disk/by-id/ata-...-part2 to appear
Could not find dev/disk/by-id/ata-...-part2
Want me to fall back to dev/disk/by-id/ata-...-part2 ? (Y/N)
The reason for that is that newer versions of Suse reference the storage device (the disks) "by-id" instead of "by-name". A simple solution for this problem can be found in this blog entry.