CDs- yes, the plastic wrap yields easily to a small knife- it is that plastic strip underneath the wrap and glued to the top of the case. It has the name of the cd (or dvd) with a bar code that seems to differ from the cash register code. It wraps the top and is stuck to the tops of the labels on the case, it is labeled 'pull at one corner, and is supposed to peel off, but often doesn't.

Or is this a North American hazard?