Created attachment 146337 [details]
An example of how this bug works. See inside for detailed instructions.

When the header has a full-page image (for example to be used as a background image), it is almost impossible to edit the body text, because when clicking the (empty) body, it will select the image instead. 

Steps to reproduce:
1. Create a page-size image
2. Insert that image into the header, size as full page, wrap as background
3. Click somewhere on the body

Result
4. It selects the background image, making it impossible to insert text.

Expected result:
4. The cursor is placed on the empty body, ready for the user to input text. Only when editing the header, should I be able to select the image.

When does it occur:
Always.