Got a 15" PB today. After the first great impression about the 'Book' the disappointment followed really fast : the lower memory slot doesn't work. Searching for that issue I've found endless complaints about that hardware-problem. So either live with 1GB RAM in the upper slot or get rid of the PB 15". Can't believe, Apple got away with that issue ... Does anyone here has a solution how to fix that problem? Anyone here running a PB 15" with 2Gigs RAM at all?