The original issue you reported is gone, the one with the drop shadow has returned: either you put this back into the css or there is some server caching bringing the css back...
/* This division wraps the entire forum when a forum width is set. */
margin: 0 auto;
box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.65);
/* lets give all forms zero padding/margins */