Auto-Pack packs edited images as internal PNG

With Automatically Pack Into .Blend turned on, one would reasonably assume that Blender automatically saves images into the .Blend.

![alt text]( pasteall.org/pic/show.php Data")

While it does technically pack images, any texture painting progress is still lost after saving. Since Pack Image does not work for edited images anyway,

it would make a lot of sense to pack edited images from disk as an internal PNG when saving while Auto-Pack is on.