Ticket #17942: 17942.diff

wp-admin/includes/post.php

@@ -1809 +1809 @@
                 'help' => array( 'title' => __('Help (Alt + Shift + H)'), 'onclick' => 'fullscreen.help();', 'both' => false )
         );
 
+        if ( is_multisite() && ( ( ! $mu_media_buttons = get_site_option( 'mu_media_buttons' ) ) || empty( $mu_media_buttons['image'] ) ) )
+                unset( $buttons['image'] );
+
         $buttons = apply_filters( 'wp_fullscreen_buttons', $buttons );
 
         foreach ( $buttons as $button => $args ) {