2009 model macbook crack?

Hi I was wondering if anyone has experienced the palm rest cracks with the new 2009 model white macbooks. I have heard these cracks were prevalent before but now I am curious as to what apple did to solve this problem. Does anyone know if the casing of the new 09 macbooks is designed differently? Uses a different material? Does anyone have any information on this issue? Thanks

The reason I am asking is because this cracking defect is a make it break it deal for me. I want to be sure that something has been changing since the previous models that used to crack. I do not want to dish out an extra 200-300 for an aluminum either. Thanks for your help

Message was edited by: efplaya85