Playing around with my first MBP here, and the Superdrive sounds a little funny when I insert a CD. It's hard to explain, but it goes something like this: "wew wew wew" as CD is pulled into laptop "wew thup wew thup" right after CD is fully inside laptop Is this normal? It sure doesn't sound normal. The "thups" are relatively loud. But it seems to work ok. As it ejects, I get a "wew thup". thanks for your feedback.