@int_ua: You should uninstall any old uboot version before installing this new (see first post)! Otherwise it will not work.

@don_falcone: in /boot/ are stored bootable zImages and in MyDocs are stored uImages (zImages converted to special uboot format). Also, uboot cannot read rootfs ubifs nand where is also stored /boot/ subfolder and DEB packages shouldnt (or cant) install files to MyDocs.