Unable to delete form elements with backspace key

[IBM_RQM]

If editor contains a button (created by using <button> tag), then placing the cursor to the right of button and pressing "Backspace" key, does not delete the button. Instead it goes on deleting the button title. If you place the cursor to the left of the button and pressed "Delete" key, then that deletes the button successfully.

Also, we cannot put the cursor between 2 consecutive buttons. Deleting the first button using "Delete" key, also deletes the second button.

[Jakub Ś]

This is true for Firefox and Opera browsers.

Issue concerns input filed, text area, checkbox, radio button, button and img button. I have not been able to delete all of this elements since version CKEditor 3.3 but text area has been undeletable from version 3.2