Not sure if this is a bug or a missing feature, plus its not the biggest issue but hey it might be an easy fix:
If you select an image or a mesh in the editor then changing the path to a new image doesnt work.
This would be super usefull to fix missing images when paths have changed.
(I know you can use the find and replace menu to fix up refrences but it would be great to be able to do it per image, plus it feels like thats what having the editable path box is there for.)