This is the (slightly unusual, I grant you) situation:

- Attach existing images: disabled
- 'create images' permission: not granted.
- 'attach images' permission: granted

So a user creating a new story node can't see anything for Attached images, because he may neither attach existing ones nor upload a new one. This is working fine.

But! The user should technically be able to edit story node and *remove* the images already attached. This does not currently work.

I'm filing this for future reference, but it's such a bizarre case I'm not sure it's worth fixing. Why would you have a situation where users can strip a story of its images but not replace them?