Force IE contentEditable element to create line breaks on Enter key, without breaking Undo

Question

On Internet Explorer, a contentEditable DIV creates a new paragraph (

) each time you press Enter whereas Firefox creates a
<

Answer 1

Hold down shift when you press enter for breaks, don't hold it down for full paragraphs. This behaviour is the same by default in Firefox, given a contenteditable area containing a paragraph: i.e.

    
If you are typing here