Some examples of the changes:
The original text on capital punishment provoked a wideranging debate which led to further clarification in the encyclical Evangelium Vitae. Thus the original sentence on capital punishment has been omitted, reflecting a developing consensus within the Catholic Christian community against this practice.
Some texts have been edited so that a clearer weight is given to central concerns. A reference to angels has been dropped in a passage where it was not necessary to the main point and so was distracting. The present text is clearer.
There is more nuanced approach to some sexual issues, with a greater emphasis on psychological and social factors affecting the relative culpability of certain acts.
A stronger emphasis on justice and essential human rights has led to the alteration of some of the words in the section on private property.
On contemporary developments in medicine, in particular on the question of organ transplant, the approach is more positive, nuanced and open.