  We discuss the implementation and properties of the quenched approximation in
the calculation of the left-right, strong penguin contributions (i.e. Q_6) to
epsilon'/epsilon. The coefficient of the new chiral logarithm, discovered by
Golterman and Pallante, which appears at leading order in quenched chiral
perturbation theory is evaluated using both the method proposed by those
authors and by an improved approach which is free of power divergent
corrections. The result implies a large quenching artifact in the contribution
of Q_6 to epsilon'/epsilon. This failure of the quenched approximation affects
only the strong penguin operators and so does not affect the Q_8 contribution
to epsilon'/epsilon nor Re A_0, Re A_2 and thus the Delta I=1/2 rule at tree
level in chiral perturbation theory.
