Diff xists betwn 2005B n 2007B

Hi,

there xists diff betwn 2005B n 2007B which are affecting some technical customization works, like a query with optional date parameter in 2005B is not behaving in such with 2007B. again some stored procedures are not working as b4 in 2005B when now being in 2007B. Have any one who uses 2007B noticed such irelavant actions? Kindly share ur points wat can be done in order to rectify it any way?

thks,