Index: wp-includes/class-wp-editor.php
===================================================================
--- wp-includes/class-wp-editor.php	(revision 18682)
+++ wp-includes/class-wp-editor.php	(working copy)
@@ -607,7 +607,7 @@
 			'numlist' => array( 'title' => __('Ordered list (Alt + Shift + O)'), 'onclick' => 'fullscreen.ol();', 'both' => false ),
 			'1' => 'separator',
 			'blockquote' => array( 'title' => __('Blockquote (Alt+Shift+Q)'), 'onclick' => 'fullscreen.blockquote();', 'both' => false ),
-			'image' => array( 'title' => __('Insert/edit image (Alt + Shift + M)'), 'onclick' => "jQuery('#add_{$media_link_type}').click();", 'both' => true ),
+			'image' => array( 'title' => __('Insert/edit image (Alt + Shift + M)'), 'onclick' => "jQuery('#content-add_{$media_link_type}').click();", 'both' => true ),
 			'2' => 'separator',
 			'link' => array( 'title' => __('Insert/edit link (Alt + Shift + A)'), 'onclick' => 'fullscreen.link();', 'both' => true ),
 			'unlink' => array( 'title' => __('Unlink (Alt + Shift + S)'), 'onclick' => 'fullscreen.unlink();', 'both' => false ),