So I have the Firefight! sheet in front of me, and the book. I checked them against each other. The only mistake in Firefight!, as has been pointed out, is that Advance against Advance is an Independent test, not a Versus test. (p. 494)
The other thing Luke is referencing is that the Close Combat Action Matrix (p. 497 in the book) on the Firefight! sheet has a mistake: Overbearing against Grenades is an Independent test, not a Versus test.