I got a warped cd once. I got a Memorex cd label stomper- pressed labels on to cds, and it came with a cd that had templates. That cd was in the bottom of the box in a little plastic sleeve, and it was warped. I put that baby in my cdrom and it rattled so bad I thought it was going to break up. I tried pressing it flat with a stack of books and I heated it up with a hair dryer and tried to flatten it. Nothing worked, so I bent it the rest of the way and broke it, but it shattered into a thousand pieces and took me nearly a half hour to clean up.