From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alessandro Rubini <rubini-list@gnudd.com>
Date: Wed, 5 Aug 2009 17:46:03 +0200
Subject: [U-Boot] [U-BOOT] error: end address not on sector
	boundary	when I use saveenv cmd
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>   I already looked at my  config file, but couldn't root cause the problem
>   Here are some of the definitions from my configs, incase anything wrong

>      CONFIG_SYS_FLASH_BASE  0x10000000
>      CONFIG_ENV_ADDR        0x10040000

Ok. But you'd better copy whole lines from config file instead of
choosing words from them. Sometimes the error is in the details.

>                 SECTOR_SIZE SZ_256K  // 256KB sector size

(the comment is redundant here)

so the environment is in the second sector (it starts at the
beginning of a sector). You problem is with the end, so
CFG_ENV_SIZE must be wrong in your config. It should be
256k as well. 

/alessandro