hey guys my mac mini is acting weird.. its related to cds.. it will not read any cd except for the install disc . it just spits out all other cds.. wtf! so far i have looked @ doing repair disc permissions, and a zapping the pram! im starting to think there may be dirt on the lens. But the fact is iv never really used the cd drive + its actually reading 1 type of disc i have done a search & cannot find a solution. any ideas guys?