Hi i have an early macbook black. My drive is a MATSHITADVD-R UJ-857 and the firmware revision is HBEA. I made a full restore of my system 2 weeks ago and since then im having trouble reading and burning some discs. For example, my retail leopard disc cant be read and it's ejected after 20 seconds (its unscratched). On the other hand, my retail windows xp disc have no problem. I can also read some game DVD with no problem. Its also impossible to read or burn blank dvds (didnt test cds). Since i dont have problem with all discs and because the problem started kind of at the moment i did my restore i think its software related but im not sure about it. Anybody here have an idea on how to fix my problem?