Another important* (enough to make its own post instead of just comment in my previous posts on the announcement or OD 2) change is the addition of the OD 1 Introduction and the changes to the heading of Section 132.
Again, nothing was written in way of introduction to OD 1 before. And the introduction now reads: “The Bible and the Book of Mormon teach that monogamy is God’s standard for marriage unless He declares otherwise (see 2 Samuel 12:7-8 and Jacob 2:27, 30). Following a revelation to Joseph Smith, the practice of plural marriage was instituted among Church members in the early 1840s (see section 132). From the 1860s to the 1880s, the United States government passed laws to make this religious practice illegal. These laws were eventually upheld by the U.S. Supreme Court. After receiving revelation, President Wilford Woodruff issued the following Manifesto, which was accepted by the Church as authoritative and binding on October 6, 1890. This led to the end of the practice of plural marriage in the Church.”
In regards to Section 132 the heading used to read:
“Revelation given through Joseph Smith the Prophet, at Nauvoo, Illinois, recorded 12 July 1843, relating to the new and everlasting covenant, including the eternity of the marriage covenant, and also the plurality of wives (see History of the Church, 5:501–7). Although the revelation was recorded in 1843, it is evident from the historical records that the doctrines and principles involved in this revelation had been known by the Prophet since 1831.”
*Important takes on so many meanings with this much change. See, as a great example. Ben P.’s post on “one of the more seemingly mundane changes, but perhaps the most frequent, concerns the reference’s to Joseph Smith’s history.” Mundane perhaps, but so important.