Index: wp-admin/includes/class-wp-list-table.php
===================================================================
--- wp-admin/includes/class-wp-list-table.php	(revision 19560)
+++ wp-admin/includes/class-wp-list-table.php	(working copy)
@@ -209,6 +209,10 @@
 			echo '<input type="hidden" name="orderby" value="' . esc_attr( $_REQUEST['orderby'] ) . '" />';
 		if ( ! empty( $_REQUEST['order'] ) )
 			echo '<input type="hidden" name="order" value="' . esc_attr( $_REQUEST['order'] ) . '" />';
+		if ( ! empty( $_REQUEST['post_mime_type'] ) )
+			echo '<input type="hidden" name="post_mime_type" value="' . esc_attr( $_REQUEST['post_mime_type'] ) . '" />';
+		if ( ! empty( $_REQUEST['detached'] ) )
+			echo '<input type="hidden" name="detached" value="' . esc_attr( $_REQUEST['detached'] ) . '" />';
 ?>
 <p class="search-box">
 	<label class="screen-reader-text" for="<?php echo $input_id ?>"><?php echo $text; ?>:</label>