Hi Eric,
I can reproduce the backspace button issue on Chrome every time I try.
1. Browser = Chrome (latest version).
2. Visit Cute Editor demo page from any other page (page A).
3. Copy text from demo page or any other page.
4. Click inside Cute Editor's editing area.
5. Paste text.
6. Press the keyboard's backspace button.
7. User is returned to Page A as if browser backspace button had been pressed.