bernd 
Hi,
my problem is that u-boot is always using the default environemt.
This is what i did:
bernd@e4400:~$ picocom -b 115200 /dev/ttyUSB0
picocom v1.4
port is : /dev/ttyUSB0
flowcontrol : none
baudrate is : 115200
parity is : none
databits are : 8
escape is : C-a
noinit is : no
noreset is : no
nolock is : no
send_cmd is : sx -vv
receive_cmd is : rz -vv
Terminal ready
Supervivi> load ram 0x31000000 239016 u
USB host is connected. Waiting a download.
Now, Downloading [ADDRESS:31000000h,TOTAL:239026]
RECEIVED FILE SIZE: 239026 (116KB/S, 2S)
Downloaded file at 0x31000000, size = 239016 bytes
Supervivi> go 0x31000000
go to 0x31000000
argument 0 = 0x00000000
argument 1 = 0x00000000
argument 2 = 0x00000000
árgument 3 = 0x00000000
U-Boot 1.3.2-dirty-moko12 (Apr 16 2009 - 18:14:52)
I2C: ready
DRAM: 64 MB
Flash: 2 MB
NAND: 64 MiB
*** Warning - bad CRC or NAND, using default environment
USB: S3C2410 USB Deviced
In: serial
Out: serial
Err: serial
MAC: 08:08:11:18:12:27
Hit any key to stop autoboot: 0
MINI2440 # nand scrub
NAND scrub: device 0 whole chip
Warning: scrub option will erase all factory set bad blocks!
There is no reliable way to recover them.
Use this command only for testing purposes if you
are sure of what you are doing!
Really scrub this NAND flash? <y/N>
Erasing at 0x3ffc000 -- 100% complete.
Bad block table not found for chip 0
Bad block table not found for chip 0
OK
MINI2440 # nand createbbt
Create BBT and erase everything ? <y/N>
Skipping bad block at 0x03ff0000
Skipping bad block at 0x03ff4000
Skipping bad block at 0x03ff8000
Skipping bad block at 0x03ffc000
Creating BBT. Please wait ...Bad block table not found for chip 0
Bad block table not found for chip 0
Bad block table written to 0x03ffc000, version 0x01
Bad block table written to 0x03ff8000, version 0x01
MINI2440 # nand write 0x31000000 u-boot
NAND write: device 0 offset 0x0, size 0x40000
262144 bytes written: OK
MINI2440 # resetţ
U-Boot 1.3.2-dirty-moko12 (Apr 16 2009 - 18:14:52)
I2C: ready
DRAM: 64 MB
Flash: 2 MB
NAND: 64 MiB
*** Warning - bad CRC or NAND, using default environment
USB: S3C2410 USB Deviced
In: serial
Out: serial
Err: serial
MAC: 08:08:11:18:12:27
Hit any key to stop autoboot: 0
MINI2440 # printenv
bootargs=root=/dev/mtdblock3 rootfstype=jffs2 console=ttySAC0,115200
bootcmd=
bootdelay=3
baudrate=115200
ethaddr=08:08:11:18:12:27
ipaddr=10.0.0.111
serverip=10.0.0.4
netmask=255.255.255.0
usbtty=cdc_acm
mtdparts=mtdparts=mini2440-nand:256k@0(u-boot),128k(env),5m(kernel),-(root)
mini2440=mini2440=0tb
bootargs_base=console=ttySAC0,115200 noinitrd
bootargs_init=init=/sbin/init
root_nand=root=/dev/mtdblock3 rootfstype=jffs2
root_mmc=root=/dev/mmcblk0p2 rootdelay=2
root_nfs=/mnt/nfs
set_root_nfs=setenv root_nfs root=/dev/nfs rw
nfsroot=${serverip}:${root_nfs}
ifconfig_static=run setenv ifconfig
ip=${ipaddr}:${serverip}::${netmask}:mini2440:eth0
ifconfig_dhcp=run setenv ifconfig ip=dhcp
ifconfig=ip=dhcp
set_bootargs_mmc=setenv bootargs ${bootargs_base} ${bootargs_init}
${mini2440} ${root_mmc}
set_bootargs_nand=setenv bootargs ${bootargs_base} ${bootargs_init}
${mini2440} ${root_nand}
set_bootargs_nfs=run set_root_nfs; setenv bootargs ${bootargs_base}
${bootargs_init} ${mini2440} ${root_nfs} ${ifconfig}
mtdids=nand0=mini2440-nand ...stripped-down