I have the most recent 1ghz 12" Powerbook with 768mb of RAM running 10.3.2. When I first got it back in November it ram smooth as silk. Sometime in December the hard drive developed a 'click' sound. The sound comes at regular intervals of 20-30 seconds or so. The click happens with or without any applications running. When I check the Activity Monitor as the click happens it shows a spike in both disc and network activity. This also happens when my ethernet cable is unplugged. I'm fairly compitent with Macs but haven't a clue about UNIX to check the exact systems processes in the terminal (if that's what I could do to figure this out). The odd thing is that the click doesn't always happen. Anyway, there seems to be no effects on the performance, so I'm not too concerned. Does anybody know what this could be? Is it a hardware issue or something that came with 10.3.2 (like the eternal fan)?