@sinovoip: This was a question waiting for an answer.
And may I add a suggestion? If you really wasted already your time playing around with different 'SDK' versions for A83T, H8 and R58 it would be great if you extrakt the small boot0 BLOBs for each board (as outlined here) and upload it to https://github.com/BPI-SINOVOIP/BPI-files since then there's no need for your users to deal with different 'SDK' versions since it's just the boot0 BLOB that needs to be replaced when you still rely on the aging BSP u-boot 2011.09.