I've downloaded both 10.5.2 now and Leopard Graphics Update. Don't forget to do software update check again after the 10.5.2 update for the Leopard Graphics Update. Post your thoughts here MBA users. Is your battery lasting longer, are your CPU temperatures lower and fan speeds lower during a HD movie or any extended movie clip. This is especially important since the Leopard Graphics update SHOULD help significantly us MBA users in the HD and Standard movie department. I don't have any thoughts yet, but I have everything written down from all the stuff I've been doing along with their temperature records and fan records. I'll be checking soon to see if I get better processing and lower temps during HD movie playback.