Just upgraded from the 3GS to the 4. With the new 4 I synched it to my itunes on the MBP. Now about a 1/4 of the apps have ? marks next to them. I know it can not locate them in Itunes but isn't the MAC supposed to be big because the ease of use? It didn't matter what I did, I could not get the apps back on and now are gone for some reason. Why would my MBP not be able to locate them when I only went from a 3GS to a 4? What gives.....