Fixes hidden menu items

wp-content/themes/tn-2012/sass/screen.scss

@@ -77,7 +77,6 @@ body {
 
         #header-container {
             @include grid_container;
-            @include clearfix;
 
             .site-title {
                 @include grid(6);
@@ -122,7 +121,7 @@ body {
 
                         &:hover ul, &:focus ul {
                             display:block;
-                            z-index:9;
+                            z-index: 9;
                             color:rgba(255,255,255,1);
                             background:darken($main-color, 10%);
                         }

wp-content/themes/tn-2012/stylesheets/screen.css

@@ -126,8 +126,6 @@ body #site-header #header-container {
   margin-left: auto;
   margin-right: auto;
   width: 1200px;
-  overflow: hidden;
-  *zoom: 1;
 }
 body #site-header #header-container .site-title {
   display: inline;