About 2 months ago, I started noticing a little nuisance with my computer. My computer has been getting "hung up" (a brief 1/2 second "pause"/"hang") that causes everything I'm doing to stop briefly. I usually notice it when I'm typing something. I'll be typing, and the system will "hang" and my text will not appear until a half second later. Through the use of Activity Monitor, I *THINK* I have discovered that this happens everytime an occurence of "nice CPU usage" happens. I actually don't have any idea what "nice CPU usage" is, but I attached a screen shot of Activity Monitor. The processes in blue are the "nice CPU usage" processes. I don't know what application is responsible for the usage, but whatever it is seems to be causing the "hanging" of my system, because every time nice CPU usage shows up in Activity Monitor, my system hangs. Can someone please give me some guidance, share your knowledge, experience, and/or give me advice on what to do to resolve this? I just started noticing this problem about 2 months ago like I said, and I've had the computer since July '03. So, it worked awesome for 8 months, and now this annoying little common occurence has shown up.