Wrong-size sprites are caught and can be redone (v0.16.0) · Sprite Manager devlog

Every sprite of a character has to share the same canvas. An upload of the wrong size is now refused, with both sizes named.
A new "Wrong canvas size" list shows accepted sprites that slipped through: three frames of the Galean soldier's south walk (frames 2 and 5 are one pixel short; frame 7 is about half size).
A walk frame can be requested again with one click. Accepting the redo retires the old frame and archives it rather than leaving two versions of the same frame.