Index: wp-admin/options-discussion.php
===================================================================
--- wp-admin/options-discussion.php	(revision 21651)
+++ wp-admin/options-discussion.php	(working copy)
@@ -71,7 +71,8 @@
 
 <label for="close_comments_for_old_posts">
 <input name="close_comments_for_old_posts" type="checkbox" id="close_comments_for_old_posts" value="1" <?php checked('1', get_option('close_comments_for_old_posts')); ?> />
-<?php printf( __('Automatically close comments on articles older than %s days'), '</label><input name="close_comments_days_old" type="number" min="0" step="1" id="close_comments_days_old" value="' . esc_attr(get_option('close_comments_days_old')) . '" class="small-text" />'); ?>
+<?php printf( __('Automatically close comments on articles older than %s days'), '</label><label for="close_comments_days_old"><input name="close_comments_days_old" type="number" min="0" step="1" id="close_comments_days_old" value="' . esc_attr(get_option('close_comments_days_old')) . '" class="small-text" />'); ?>
+</label>
 <br />
 <label for="thread_comments">
 <input name="thread_comments" type="checkbox" id="thread_comments" value="1" <?php checked('1', get_option('thread_comments')); ?> />
@@ -79,7 +80,7 @@
 
 $maxdeep = (int) apply_filters( 'thread_comments_depth_max', 10 );
 
-$thread_comments_depth = '</label><select name="thread_comments_depth" id="thread_comments_depth">';
+$thread_comments_depth = '</label><label for="thread_comments_depth"><select name="thread_comments_depth" id="thread_comments_depth">';
 for ( $i = 2; $i <= $maxdeep; $i++ ) {
 	$thread_comments_depth .= "<option value='" . esc_attr($i) . "'";
 	if ( get_option('thread_comments_depth') == $i ) $thread_comments_depth .= " selected='selected'";
@@ -89,7 +90,8 @@
 
 printf( __('Enable threaded (nested) comments %s levels deep'), $thread_comments_depth );
 
-?><br />
+?></label>
+<br />
 <label for="page_comments">
 <input name="page_comments" type="checkbox" id="page_comments" value="1" <?php checked('1', get_option('page_comments')); ?> />
 <?php