I'm having a strange problem with my MacBook. I'm dual monitoring, and yesterday the screen on my actual MacBook went to the blue apple background instead of the BMW M Coupe I had as the background. Strange, but I didn't really care. Then today, I decide to change the background on the 21". I try and change it once and System Preferences crashes and I relaunch it. Now when I click on a new background it doesn't work and it spikes my CPU a bit. These wallpapers were downloaded off of a forum (downloaded each of them individually) and originally resided on my desktop (icons) but then I moved them to my HD. Thats when the problem started. Any ideas? PS: Is my CPU supposed to spike when my HD is being used (searching for something in finder)?