Ticket #11651: 11651.6.three-col-on-1280.patch

wp-admin/css/wp-admin.dev.css

@@ -2224 +2224 @@
         margin: 0 40px 0 24px;
         max-width: 270px;
         min-width: 220px;
-        width: 35%;
+        width: 25%;
         float: left;
 }
 .welcome-panel .welcome-panel-column:last-child {