soju22

Well, to fix this :

In wpthumb.php :

function wpthumb_post_image( $null, $id, $args ) {
	$wpsize = $args;

	//.....

	list( $html_width, $html_height ) = image_constrain_size_for_editor( $html_width, $html_height, $wpsize );

	return array( $image_src, $html_width, $html_height, true );
}