Your blows land on your own faction again, grudges hold in multiplayer, and form attacks and powers train the skill they scale with. None of it was tested in game, so please report what you find.
The Skadi's Drake and Moder fly differently, every Fenrir form has a role, and the Alfar drones carry wood to the kiln again. Players tested the drone fix; the Skadi and Fenrir changes were not tested in game, so please report what you find.
The vampire was all strength and no price. Infinite stamina, a bat that crossed the map at 50 m/s for free while its aura drained everything below, and no real weakness. Players on Discord said so, and they were right. v1.6.1 gives the Aswid a cost for its power, and makes each part of that cost configurable.
A one-fix release. With the Valkyr body replacer, leaving a monster form brought your body back without its hair. Now the hair comes back too.
The Skeleton can laugh, the Furling's fire reaches crossbow bolts, and transformed players stop firing a crossbow they aren't holding.
A player asked for a way to translate the mod. Every text it shows now lives in plain JSON files instead of its code, and it ships in English and Italian. On the way, Valheim 1.0 turned out to be sorting two of the mod's stations into the wrong build menu, the Trol's True Form was switching itself off, and the Aswid's Eclipse had never worked at all.
A tester brought a second Skadi along, turned into Moder, and found that each of them saw themselves correctly and the other one full-sized. That is the whole class of bug this release is about: a form built around the local player, with the remote copy left to guess.
A tester noticed wood going missing. Building something your race is not allowed to build showed the refusal, stopped the building, and then charged you for it anyway — because Valheim takes the cost in a step that never heard about the refusal.
Plus a gamepad problem with the same shape: a Skadi who could barely build, because every piece she placed also cast a spell.
Valheim 1.0 added fields to every shop item, and a September hotfix changed how the game reads a gamepad's left stick. Both landed on this mod: the faction merchants could not open a shop window at all, and the Drake could not fly. Plus the Fenrir running at twice the speed it advertises, which has been true for a long time and nobody had measured.
Valheim 1.0 added one extra value to the calls that put an item into a station, and changed how a mead barrel records what is in it. Neither is a large change. Between them they stopped every Bone Servant working, at every station in the game, and quietly took the Aswid's four-times fermentation away.
Alongside those: the radial menu, flight on a gamepad, and six fixes to the Sverm's colony.