When I went with CS4 upgrade recently (I started with v.5 a long time ago) I was initially annoyed with the new clone tool behavior. But now that I understand what it is showing me and how to work with it, it is really better.
It is so easy for all of us to get locked in to our standard routine, that we shun improvements simply because we have to learn something new which may take a few minutes away from our precious post processing time. While it is always your personal choice to go with or decline a new option, why did you upgrade to CS4? What were your reasons? Very likely the answer is NEW FEATURES!