I recall we had that discussion maybe before (or was that in the tibook list) ?? Anyways according to some apple tech doc which I found long time ago, the slot loading drives CAN only use standard CD sizes, which are the 12 and 8 cm round ones ... They only object to non-standard ones ... Triangle, hearts, those silly business card shaped ones ... Now ... I have not dared yet to stick a 8cm into my wife's iBook (please, spare me funny comments, I know I was about to write "slot") .. And I have never done so with my tibook ... Anyone here uses them on a daily basis and can give me some reassurance ? Thanks P