Hi, I got same errors, tried multiple versions of uBoot, from the one you recommended: http://people.debian.org/~tbm/u-boot/2011.03-6/sheevaplug/u-boot.kwb to http://people.debian.org/~tbm/u-boot/2011.06-2/guruplug/u-boot.kwb and http://people.debian.org/~tbm/u-boot/guruplug/u-boot.kwb
none really helped any clues? yves