Xanathar's Guide to Everything

Introduction (p. 4)

No notes.

Chapter 1: Character Options (p. 7)

pp. 24-26, Learning Beast Shapes: These tables do not include any of the new beasts from Volo's Guide to Monsters. Those additions include:

Arctic: No new beasts.

Coast

Desert: No new beasts.

Forest

Grassland

Hill

Mountain

Swamp

Underdark

Underwater

p. 47, Swashbuckler: The following sidebar was not reprinted from p. 136 of the Sword Coast Adventurer's Guide (which in turn reprinted an edited version from "Unearthed Arcana: Waterborne Adventures"):

Swashbucklers and Two‐Weapon Fighting 

The swashbuckler relies on a good understanding of the D&D rules to realize its potential, specifically when it comes to fighting with two weapons. Other characters must use an action to Disengage if they want to escape a melee, but the Fancy Footwork feature of the Swashbuckler bundles a more limited version of Disengage within your attack. This allows you to use your bonus action to fight with two weapons, and then safely evade each foe you attacked.  

Chapter 2: Dungeon Master's Tools (p. 77)

pp. 101-102, Hill Encounters (Levels 1-4): The 38-40 result has "dwarf" in bold text, but there is no "dwarf" stat block in the Monster Manual. Either put "dwarf' in plain text, or add a stat block name in parentheses (commoner, noble, etc.).

pp. 132-133, Research: Under Resources, the base cost is 50 gp, but Resolution refers to "the initial 100 gp." In the original "Unearthed Arcana" version of these rules, the base amount was 100 gp, so either 1) the base amounts should be 100 gp, or 2) "the initial 100 gp" should be changed to "the initial 50 gp." 

Chapter 3: Spells (p. 147)

No notes.

Appendix A: Shared Campaigns (p. 172)

No notes.

Appendix B: Character Names (p. 147)

No notes.