I just want to mention that Microsoft still have problem with Grid and List view in Win 8 RP and this is the Link .... http://social.msdn.microsoft.com/Forums/en-US/winappswithhtml5/thread/90275bb4-8b9b-46c2-8507-0b399d17e12f[^] I hope that they dont have other problems that the developer need to know about it