Hi,
Go to modules/text.php line 110 and add after $name = $tag['name']
the following lines :
$values = (array) $tag['values'];
// Value
if ( is_a( $wpcf7_contact_form, 'WPCF7_ContactForm' ) && $wpcf7_contact_form->is_posted() ) {
if ( isset( $_POST['_wpcf7_mail_sent'] ) && $_POST['_wpcf7_mail_sent']['ok'] )
$value = '';
else
$value = stripslashes_deep( $_POST[$name] );
} else {
$value = isset( $values[0] ) ? $values[0] : '';
}
if($_POST[$name] == $values[0]) $_POST[$name]= '';
Good luck.