So two days ago, I was listening to music on iTunes, and every once in a while, it'd pause inexplicably for a second or two. I thought it was some sort of software problem, so I fiddled around with that for a while and got nothing. Then my hard drive starts making weird noises. It sounded like it was struggling. So I booted to a CD to run Disk Utility. My drive wasn't even recognized. So yesterday I went to the Apple Store and the hard drive worked fine. They ran Norton on it, and it caught a few problems, and now it seems to be working fine. But to be sure, today I bought an external HD and backed up all my files. My question is, is there something wrong with my hard drive? Or was it just a fluke? Or did Norton fix it? I think I'm going to have them replace the HD just in case, since I'm under warranty, but I'd be interested to hear what people have to say on the matter. By the way, I'm using an iBook G4 with OS 10.3.9.