10.7: Completely disable Resume – Mac OS X Hints

Disable Saved Application States

OS X Lion offers a checkbox to disable saved application states. However, many applications do not seem to care about that checkbox (e.g. Terminal). The easiest way to prevent applications from writing away saved states is exactly that: don’t let them write to the saved application states folder.

via 10.7: Completely disable Resume – Mac OS X Hints.