White Area under Main Navigation after Upgrade to 1.5.4

OK I have the solution ??
I have put the ‘margin-top: 0;’ in the full-width.css and know
it is all finne ??

.gd-full-width,
.gd-full-width .site-container,
.gd-full-width .site-container .site-inner,
.gd-full-width .site-container .site-inner .wrap,
.gd-full-width .site-container .content-sidebar-wrap,
.gd-full-width .site-container main.content,
.gd-full-width .site-container main.content > article.entry,
.gd-full-width .site-container main.content > article.entry .entry-content {
   max-width: 100%;
   width: 100%;
   background: none;
   border: 0;
   float: none;
   margin-left: auto;
   margin-right: auto;
   margin-bottom: 0;
   margin-top: 0;    <---- NEW
   padding: 0;
   box-shadow: none;
   border-radius: 0;
   -webkit-border-radius: 0;
   -webkit-box-shadow: none;
}