Annoying JAWS 13 + IE 9 ARIA landmark role on div element bug

If you place role=main (example 1) or other landmark role on a div containing form fields, when JAWS 13 (using IE) is in forms mode it announces "landmark region" along with the field label text, each time a field receives focus. If you place the form landmark role on a div element or form element, nested inside the div element (example 2 & example 3) JAWS does not announce "landmark region" inappropriately. It instead announces the controls label as it should.

Example 1: role=main on div element

code example 1:

<div role="main"> <p><LABEL for="strFirstName">First name:</LABEL><INPUT id="strFirstName" type="text"></p> <p><LABEL for="strSurname">Last name:</LABEL><INPUT id="strSurname" type="text"></p> </div>

Example 2: role=form on a div element nested in div role=main element

code example 2:

<div role="main"> <div role="form"> <p><LABEL for="strFirstName">First name:</LABEL><INPUT id="strFirstName" type="text"></p> <p><LABEL for="strSurname">Last name:</LABEL><INPUT id="strSurname" type="text"></p> </div> </div>

Example 3: role=form on a form element nested in div role=main element

code example 3:

<div role="main"> <form role="form"> <p><LABEL for="strFirstName">First name:</LABEL><INPUT id="strFirstName" type="text"></p> <p><LABEL for="strSurname">Last name:</LABEL><INPUT id="strSurname" type="text"></p> </form> </div>