Index: wp-admin/ms-users.php
===================================================================
--- wp-admin/ms-users.php	(revision 14626)
+++ wp-admin/ms-users.php	(working copy)
@@ -170,7 +170,7 @@
 		<table class="widefat">
 			<thead>
 			<tr>
-				<th class="manage-column column-cb check-column" id="cb" scope="col">
+				<th class="manage-column column-cb check-column" scope="col">
 					<input type="checkbox" />
 				</th>
 				<?php
@@ -190,7 +190,7 @@
 			</thead>
 			<tfoot>
 			<tr>
-				<th class="manage-column column-cb check-column" id="cb" scope="col">
+				<th class="manage-column column-cb check-column" scope="col">
 					<input type="checkbox" />
 				</th>
 				<?php echo $col_url; ?>