Tonight I've been trying to rip my copy of "Once" to my hard drive but for some reason my iMac rejects the DVD!! It doesn't register it or anything, just Ejects after about 5 seconds. I can put other DVDs such as "The Prestige" and it accepts it fine, but others like "The Queen" it rejects as well?! I've never heard of anything like this before, the disks are clean of scratches and work perfectly!