Something that has occured a few times, my 20" iMac G5 occasionally goes to the spinning beachball, and I can move the mouse but not click anything. Pressing the power button once won't put it into sleep mode and I have to hold the button to turn it off and turn it back on. When it gets back onto my desktop, for a few moments there are lots of little red dots moving around, concentrated to one area (which varies but has so far been to the right side of the screen). I should mention that twice I tried going to 'Disk Utility', clicking on 'Macintosh HD,' and then clicking 'Verify Disk' and it did what I explained above. It's also happened while just surfing the internet. Also, the cd drive seems to sound a little different than it used to.. though that could just be me being paranoid. Any ideas on what's going on?