Format Errors:
Page 176, Demilich: A paragraph is repeated in the description.
Page 196: Haganemnon: Alignment should read “Always chaotic neutral” or similar.
Page 211, Shadow of the Void: The creature’s subtype should read (Cold, Incorporeal) instead of (Incorporeal, Cold).
Rules Errors:
Page 18, Assassin: Uncanny Dodge doesn’t appear to stack with other classes’ Uncanny Dodge as it did before.
Page 20, Dwarven Defender: Defensive Awareness doesn’t appear to stack with Uncanny Dodge as it did before.
Page 28, Divine Emissary: the text conflicts itself: divine inspiration 1/day at 1st level and +1/day at every third level, but the text lists 11th level as one of these levels; the table supports every third level over 11th level. The table doesn’t match the text: bonus feat at 5th level (text) or 6th level (table)?
Page 29, Epic Infiltrator: The text conflicts itself: sneak attack at 1st level and each additional 3, or on levels {1, 5, 8, 11, …}?
Page 36, Union Sentinel: The table doesn’t match the text: portal guardian 1/day or 2/day at 10th level?
Page 58, Improved Ki Strike: This feat is strictly worse than Penetrate Damage Reduction.
Pages 58-59, Improved Manyshot: This feat has no apparent benefit over Manyshot, as the number of attacks is capped at 4 with either feat.
Pages 59-60, Improved Spell Capacity: The use of a spell requires a spellcasting attribute of 10 + level, but Improved Spell Capacity states that the use of a spell slot requires a spellcasting attribute of 10 + level.
Page 65, Planar Turning: Instead of acting as the reflection of good characters, evil characters with this feat rebuke/command all outsiders. (If this is intentional, it is merely a format error.)
Page 174, Mithral Golem: The mithral golem requires polymorph any object to convert the iron into mithral, which is beyond the limits of the spell. Furthermore, the value of the mithral golem’s body is 8,500,000 gp, about 100 times the treasure of a standard EL 21 encounter – and roughly 8 times the total wealth of a 21st level character!
Page 174, Adamantine Golem: The adamantine golem requires polymorph any object to convert the iron into adamantine, which is beyond the limits of the spell. Furthermore, the value of the adamantine golem’s body is far beyond the expected treasure of an EL 25 encounter.
Page 254, Union Sentinel: The touch AC and heavy mace damage are incorrect (touch AC 18 (+5 deflection, +3 Dex [Dex 18, limited by an adamantine breastplate]), heavy mace 1d8+13 (+5 Str + 2 Weapon Specialization +4 Epic Weapon Specialization + 2 enhancement)