OK, I took a look. [Jerry ](https://forum.azimuthproject.org/profile/1773/Jerry%20Wedekind) was pretty on. 67 is now 66, and all of exercises 72, 75, 77, 79, 80, 82, 83, 85, 87, 90, 91, 96, 97 in the "old ordering" needed 5 added to their numbers, so I edited the numbers in the wiki. All the forum links need their titles updated. I also give per problem issues below.

- 67->66. There is already a page for 66 in the updated version, so we now have two pages on this exercise. 67 in the old version *is* the same-ish question with s/poset/preorder/ and some rewording. I think it's best to remove the current pointer to 67 and put a link in the old discussion or just remove it. (It's not that substantial, but I don't want to be rude to anyone.) I didn't touch the wiki link on this one so as not to sow confusion.
- 72->77. (Jerry suggested the "content may be off" for this one. I didn't see any differences except that Frederick numbered the two exercises 1. and 1. instead of 1. and 2.)
- 75->80. The forum page has a diagram that's not in the current version of the text, and I'm not expert it enough to verify it yet; I'm assuming it's correct.
- 77->82.
- 79->84. s/1.76/1.81/ in the text of the problem.
- 80->85. The diagram's not from the text and I haven't verified it.
- 82->87. The wording is fairly different from in the text (it's clearly the same-ish question), and I'm not 100% sure the meaning is identical.
- 83->88.
- 85->90. s/1.84/1.89/ in the text. (It would also be better if it clarified it was only restating part of Proposition 1.89.)
- 87->92. s/1.86/1.91/ in the text.
- 90->95. Example 1.94 (formerly 1.89) is included and I'm not sure why; if it does belong there it should be updated with s/1.89/1.94/.
- 91->96. The text refers to Proposition 1.81 (now 1.86) and Definition 1.70 (now 1.74), although I these could likely be deleted from the problem.
- 96->101.
- 97->102. Question seems to have been reworded substantially. It's the same-ish but I'm not sure it's the same.