I copied all of my CDs into my iTunes to put on my iPod. My favorite Creedence CD would no longer copy, so I went to iTunes and bought it from them, downloaded it and off I went.
Then my computer died. I bought a new computer and started copying ALL of my CDs again (yes, I've burned them off to DVD this time, so if it takes another crap I'm covered). Where was the CCR I'd bought from iTunes? Gone. No, you cannot download it again. My e-books were also gone - they tie them to the computer somehow (MAC address perhaps?).
No, I'll never buy e-music or books again. I re-read my books (at least the good ones) and computers WILL die upon occasion.
So, my question is - how about a right to music that I paid for and they won't let me download again?
They should implement a locker system, so that music you bought can be redownloaded. But they'll probably say you should have made a back-up, which you are legally entitled to do even with CD's you buy.