Index: src/wp-includes/js/tinymce/skins/wordpress/wp-content.css
===================================================================
--- src/wp-includes/js/tinymce/skins/wordpress/wp-content.css	(revision 28615)
+++ src/wp-includes/js/tinymce/skins/wordpress/wp-content.css	(working copy)
@@ -257,6 +257,7 @@
 }
 
 #wp-image-toolbar {
+	margin: 0;
 	position: absolute;
 }