Editing a page (Wiki Markup) in IE8, pressing the {Esc} key will wipe out all edits

When editing a page in Wiki Markup mode and in IE, pressing the

{Esc} key will wipe out all edits. Does not happen in FF.

Steps to reproduce:

1. Edit a page
2. Go to Wiki Markup Mode
3. Make a chage
4. Press {Esc}

key
5. You will see the change is lost.