Then I came home, hooked up my old computer, called Apple, transferred the Apple Care to the new owner (only three months left on it), then got a tech on the phone about deleting my stuff. He made it VERY simple - instead of me deleting all the stuff one by one, he had me set up the new owner's account (I left the password blank so the new owner can set up a password), then we simply nuked my account off the computer completely. This wiped out everything - it took about ten minutes in all, and I have to say after doing it everything was working incredibly fast, so something was definitely corrupt in my stuff or the way the computer was interacting with it. Since all that stuff is on my current computer and not impeding anything, something was awry but I know not what.