--- a/media/js/tiny_mce/plugins/fullscreen/editor_plugin_src.js	Sun May 30 20:51:41 2010 +0000
+++ b/media/js/tiny_mce/plugins/fullscreen/editor_plugin_src.js	Tue Jun 01 04:49:29 2010 +0000
@@ -110,16 +110,19 @@
 					});
 
 					t.fullscreenEditor.render();
-					tinyMCE.add(t.fullscreenEditor);
 
 					t.fullscreenElement = new tinymce.dom.Element('mce_fullscreen_container');
 					t.fullscreenElement.update();
 					//document.body.overflow = 'hidden';
 
 					t.resizeFunc = tinymce.dom.Event.add(DOM.win, 'resize', function() {
-						var vp = tinymce.DOM.getViewPort();
+						var vp = tinymce.DOM.getViewPort(), fed = t.fullscreenEditor, outerSize, innerSize;
 
-						t.fullscreenEditor.theme.resizeTo(vp.w, vp.h);
+						// Get outer/inner size to get a delta size that can be used to calc the new iframe size
+						outerSize = fed.dom.getSize(fed.getContainer());
+						innerSize = fed.dom.getSize(fed.getContainer().getElementsByTagName('iframe')[0]);
+
+						fed.theme.resizeTo(vp.w - outerSize.w + innerSize.w, vp.h - outerSize.h + innerSize.h);
 					});
 				}
 			});