of course, I tried to edit the htmlcode with the following text :
`&-l-t-;img class="remove-attributes" src="the_path_to_your_image" alt="" /&-g-t-;` (whitout the '-')
when I close the html pop-up, I can see the correct code
`[img]the_path_to_your_image[/img]`
but after validation, icon of unknown picture is displayed : the test is interpreted as true HTML code (wich describe a picture)