"If you do not want auto adjustments on by default, you will need to create new default settings for each camera model you use. Open an unedited image, turn off Use Auto Adjustments (contol-U), then choose Save New Camera Defaults from the Camera Raw menue."
Straight out of Real World Camera Raw. A great investment!
You can naturally change other defaults to suit as well.
Great advice, Mats. I've heard good things about Real World Camera Raw and plan to purchase it soon. Until then, you've saved me some frustration. Thanks.