Index: wp-admin/async-upload.php
===================================================================
--- wp-admin/async-upload.php	(revision 40923)
+++ wp-admin/async-upload.php	(working copy)
@@ -59,7 +59,7 @@
 	switch ( $_REQUEST['fetch'] ) {
 		case 3 :
 			if ( $thumb_url = wp_get_attachment_image_src( $id, 'thumbnail', true ) )
-				echo '<img class="pinkynail" src="' . esc_url( $thumb_url[0] ) . '" alt="" />';
+				echo '<img class="pinkynail" src="' . set_url_scheme( $thumb_url[0] ) . '" alt="" />';
 			echo '<a class="edit-attachment" href="' . esc_url( get_edit_post_link( $id ) ) . '" target="_blank">' . _x( 'Edit', 'media item' ) . '</a>';
 
 			// Title shouldn't ever be empty, but use filename just in case.