Index: /CKEditor/trunk/_source/plugins/autogrow/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/autogrow/plugin.js	(revision 7047)
+++ /CKEditor/trunk/_source/plugins/autogrow/plugin.js	(revision 7048)
@@ -42,5 +42,5 @@
 		}
 
-		var height = last.getDocumentPosition( doc ).y + last.$.offsetHeight;
+		var height = last.getDocumentPosition( doc ).y + last.$.offsetHeight + parseInt( last.getComputedStyle( 'margin-bottom' ) || 0, 10 );
 		last.isMarker && last.remove();
 		return height;