Fourth Edition?
. We have greatly cleaned up the scattered modifiers for difficulty and unified them in a few lists: one for equipment quality, another for basic task difficulty, another for time taken, and so on. We’ve also clarified the winning/losing conditions for Contests, and several corner cases that were left undefined in Third Edition. Margin of success doesn’t really have a special treatment per se, but it’s clearly defined and given a name (margin of success), and how it works in Quick Contests is a little clearer.