Mikhail,
Thank you for your answer.
So, there is no way to force the designer to use paragraphs (<p>) instead of breaks (<br>) inside a div element.
That way, if I want to use paragraphs inside a div element I must write some text (a letter is enough), convert it to a paragraph using the Formatting toolbar "Paragraph <p>" option and from then on I will have the paragraphs inside the div element.
IMHO VWD should have an option to turn this behavior on/off because, most of the time, it's bad web design to use breaks instead of paragraphs. At least that is what the web design experts say.
Paulo Almeida