Hate to be the bearer of bad news, but if you are having problems with WinMo 6.1, 6.5 isn't going to help that very much. WinMo 6.5 basically catches the rest of the phones up to what some manufacturers are already doing with WInMo 6.1 (like HTC with the TOchFlo3D and Samnsungs Omnia Interface). It's an interface fix and little bit of stability, but not much more than that (the exclusion of Zune is just baffling). You're better off hoping that manufacturers continue to update the interface at a pace faster than MS, otherwise no huge change will come until WinMo 7, which is a 2010 release.