why saveenv does not work?

[Al Johnson]

On Thursday 26 March 2009, Ruini Xue wrote:
>   I connect FR via /dev/ttyACM0, and modify some env variables
> (bootdelay, boot_menu_timeout), and commit them with saveenv. Then I
> poweroff it and reconnect to it on restart, but printenv shows that
> these variables are not changed. What other commands should I run to
> make these changes persistent?

Make sure you're in NAND uboot (power then aux) not NOR (aux then power) as 
saveenv doesn't work with the NOR uboot.