@juiceme Just as a reminder (due to TMavicas note above and this I already noted before, that loading from mtd5 does not work yet (at least for me), due to not 'unmounting' mtd4 or numbering ubi devive mtd5 as #2.
juice@osiris:~/kernel_dev$ diff 2.6.32.54-ubiboot-02_may/usr/ubifs/init 2.6.32.54-ubiboot-02_sep/usr/ubifs/init | grep /mnt/u5 < mount -t /mnt/u5 > mount /mnt/u5