Index: src/wp-admin/css/edit.css
===================================================================
--- src/wp-admin/css/edit.css	(revision 29120)
+++ src/wp-admin/css/edit.css	(working copy)
@@ -378,6 +378,20 @@
 	overflow: hidden;
 }
 
+/* DFW Adjustments */
+.wp-fullscreen-wrap #content-textarea-clone {
+	display: none;
+}
+
+/* DFW visual mode: override paddingTop set by editor-expand.js */
+.wp-fullscreen-wrap .mce-edit-area {
+	padding-top: 0 !important;
+}
+/* DFW text mode: override paddingTop set by editor-expand.js */
+.wp-fullscreen-wrap .wp-editor-area {
+	padding-top: 10px !important;
+}
+
 #timestampdiv select {
 	height: 21px;
 	line-height: 14px;
Index: src/wp-admin/js/post.js
===================================================================
--- src/wp-admin/js/post.js	(revision 29120)
+++ src/wp-admin/js/post.js	(working copy)
@@ -1060,6 +1060,11 @@
 		$textarea.css( 'resize', 'none' );
 
 		$handle.on( 'mousedown.wp-editor-resize', function( event ) {
+
+			if ( $contentWrap.hasClass( 'wp-editor-expand' ) ) {
+				return;
+			}
+
 			if ( typeof tinymce !== 'undefined' ) {
 				editor = tinymce.get('content');
 			}