The feature in the editor to remove unused images has a bug. It does not take into account images listed in the CSS that are not being used. That image is not being used yet the option to remove it won't remove it. That class is not being used. The Remove images should look to see if that class is being used and if not, remove the unused image.
Code:
.secbreak {
background: url(../images/secbreak.jpg) no-repeat center;
height: 30px;
border: none;
margin: 0.5em 0;
}
