A classic example of why legislation shouldn't involve technology, only effects: If you record MP3s off of your satellite radio, are you infringing a right belonging to the copyright owner, given a law that says it is legal to record music from a radio? That is, do one or both of the definitions of "radio" or "record" as used in the law somehow not apply in this case?
You can see the technology-based arguments fly in the inevitable Slashdot article: "It's the same." "No it's not." "It depends on the definition."
That last is the best argument, but the real problem here is the law that is too tied to specific technology.