I'm having a number of issues with my 15" 2.2, and I finally took it in to the local Genius bar yesterday. The annoyances have been: a sticky/clicky trackpad button, a cluster of dead/stuck pixels, and most recently, a failure of the internal speakers to work. The Genius with whom I spoke didn't identify my trackpad button as an issue, but placed an order for a new display and a new logic board for my laptop. I'll have to leave it with them for three days or so while they replace these parts. Does anyone here think replacing two major components in a six-month-old laptop is justifiable? Should I be pushing for a replacement machine?