[U-Boot] u-boot randomly lost params.

I am using 1.3.2, and discovered that the params randomly got lost. This does not happen every time, but does happen from time to time. I can not repliably reproduce it. Any hints? I am using a TI6446 EVM. Someone over at the TI mailing list suggests that the size of params is bigger than the param sector size. How to check that? T.I.A