Notable incompatibilities with Spine `v3.8.75`

[SuggonM]

1. Non-inherited rotation bug

2024-01-06_08-23-27.mp4

2025-08-17.18-02-39.mp4

Fixed in: v3.8.81
Changelog: The changelog has no entry for this fix. I merely kept bisecting the versions until finding the first version that didn't have this issue, which is 3.8.81.
Possible workaround: Manually select the bone and set its Inherit checkbox to Rotation
Notes: This is a rare occurrence (reportedly, 2 in ~400). And in both cases, the bone was observed to be bound to an IK constraint (indicated by an orange-red icon to the right of the item in panel, as seen in recording #⁠1).

2. CLI export fade-in bug

https://esotericsoftware.com/forum/d/13542-bug-on-export-imagesvideos-from-cli

Fixed in: v3.8.85
Changelog: https://esotericsoftware.com/spine-changelog/archive#:~:text=preview.-,Fixed%20CLI,start.,-Added
Possible workaround: Export the frames manually from the program. Alternatively, set a higher Spine version when exporting frames via CLI.
Notes: This only affects users that are using skel-frames.bat, otherwise it's harmless.

3. Texture unpacker bug

https://github.com/EsotericSoftware/spine-editor/issues/527

Fixed in: v3.8.83
Changelog: https://esotericsoftware.com/spine-changelog/archive#:~:text=Fixed%20texture%20unpacker,bounds
Possible workaround: Using an image editor, increase the texture image dimensions (a.k.a. canvas size) by 1 or more pixels. For accuracy, added blank pixels should be at the bottom-right.
Notes: This too, is super rare. Mostly happens with textures that are very old.

[SuggonM]

Ahh, almost forgot the unpacker bug Forsaken mentioned. I've added it to the list now

[SuggonM]

Forsaken found yet another instance of rotation bug :)

Thanks to that, I've found some clues to track down the faulty bone in the hierarchy panel. Also added the exact version it was fixed in