Recently (probably within the last 3 weeks) my iMac (Core Duo) has been acting funky. Normally it took about 30 seconds to boot up, now it is taking about triple the time. At first I thought nothing of it, but it is still bothering me how I use to be able to slightly hear the information being processed when booting up and seeing the spinning circle under the Apple logo, but now I hear a bit of information and then about a minute of silence, then more of the hardrive working, then it's booted. Another thing I noticed just today, it's probably nothing serious, however I use ClearDock for my dock and totally erase the background of the dock, so today I restart my compter and ClearDock ceased to work. I go back into the options of it, reset it and restart...Works fine. So I powered down the machine and low and behold when I start it up again, ClearDock doesn't work....Any thoughts? I'm more concerned about the speed thing. Really the only thing that seems to be bugging out is when I boot up or power down. I've only been a Mac user for 11 months, and haven't had this problem....If it's just a normal thing for it to slow down after time or information being on it, then that's just the way it goes, no big deal....I just wanted to make sure that the lagging wasn't something else.