Symptom
Holding down the Shift key while you click in List view selects the first and second items, and all items in between.
Solution
Press the Command key before clicking to select multiple noncontiguous items in Mac OS X for List and Column views. (In Mac OS 9 and earlier, pressing the Shift key while in List view allowed you to select multiple noncontiguous items.)
Behavior in Icon view remains the same in both operating systems.