I am not sure if anybody noticed or not..but the getbhavcopy data for stock futures has been wrong for the MAY series. The 1st month data is switched with the 3rd month data.
Have a look at a part of the 2011-05-17 bhavcopy :
COREPROTEC-III,20110517,293.5,295,291.25,294.4,109,3589000...