This thread is an effort to list any and all scenario corrections in one thread for quick reference. If you have any additional errata, or if I've got something wrong, just post it here and I'll update as necessary.
Austerlitz 2 December 1805 Russian Guardsmen (page 18 of booklet) • Russian Guard Light Cavalry (GLC) on left -- behind GLT and in front of Weber -- should be a Russian Guard Light Infantry (GLT)
EPIC #1 Austerlitz 2 December 1805 (card) • The Russian Grenadier (R-GR) unit behind Pratzen should be on a hill
La Grande Battles Austerlitz 2 December 1805 (card) • First special rule should read: "The 6 hexes that make up Pratzen Heights..." • Second special rule should read: "The 5 hexes that make up Stare Vinohrady...
I should note that my responses are conjecture unless I reference another source.
However, to add to the list, there is some scenario FAQ
606 Austerlitz (2 December 1805) Soult Attacks South
Q. Allies units dont retreat in this scenario. But what happens, if a (lone) Leader must retreat? A. An Allied leader does not retreat in this scenario either. If a lone leader that must retreat it will require the leader to take a casualty check and stay in his hex, if he survive. (Richard Borg: 2016 - 09 - 12)
1. The scenario map and description mentions the village of Szabathegy. The proper Hunagrian name is Szabadhegy (in Eng. Freehill: Szabad/Free; Hegy/Hill)
2. Austrian general at the base line of the Centre should be Frimont instead of Friemont.
2. One of the Austrian Generals on the Austrian Left is designated as Mescery. His name is Mecséry properly. Please be aware that misspelled form Mescery is also used in other scenarios of the Austrian expansion.
3. In the same section Gosztonyi should be used instead of Gosztony.
As I do not have a physical copy myself yet I cannot be sure if these errors have survived the final proofreading. Anyway it would be nice to see these corrected in future print-runs.