Hi there!
Got this strange problem.... I've created a mesh for an image and animated it by bones.
The thing is... there is a lot of transparent pixels within that image. So when I export the project with "strip whitespace"-boxes checked the result ingame (or also in your skeleton viewer) looks as if the sprite was stretched (just as if the stripped version was stretched to the original size of the image WITH whitespace).
By unchecking the "strip whitespace" option everything looks fine but the exported spritesheet(s) have enormous size (of course).
I guess for the moment there's no opportunity to replace the image without having to redo all the mesh-work, do I? For I don't want to get unnecessarily big spritesheets.