diff -r f507feede89a -r 09a1c134465b web/wp-admin/users.php
--- a/web/wp-admin/users.php	Wed Dec 19 12:35:13 2012 -0800
+++ b/web/wp-admin/users.php	Wed Dec 19 17:46:52 2012 -0800
@@ -75,6 +75,22 @@
 
 $update = '';
 
+/**
+ * @since 3.5.0
+ * @access private
+ */
+function delete_users_add_js() { ?>
+<script>
+jQuery(document).ready( function($) {
+	var submit = $('#submit').prop('disabled', true);
+	$('input[name=delete_option]').one('change', function() {
+		submit.prop('disabled', false);
+	});
+});
+</script>
+<?php
+}
+
 switch ( $wp_list_table->current_action() ) {
 
 /* Bulk Dropdown menu Role changes */
@@ -111,7 +127,7 @@
 		if ( is_multisite() && !is_user_member_of_blog( $id ) )
 			wp_die(__('Cheatin&#8217; uh?'));
 
-		$user = new WP_User($id);
+		$user = get_userdata( $id );
 		$user->set_role($_REQUEST['new_role']);
 	}
 
@@ -131,16 +147,22 @@
 		exit();
 	}
 
+	$userids = array_map( 'intval', (array) $_REQUEST['users'] );
+
+	if ( empty( $_REQUEST['delete_option'] ) ) {
+		$url = self_admin_url( 'users.php?action=delete&users[]=' . implode( '&users[]=', $userids ) . '&error=true' );
+		$url = str_replace( '&amp;', '&', wp_nonce_url( $url, 'bulk-users' ) );
+		wp_redirect( $url );
+		exit;
+	}
+
 	if ( ! current_user_can( 'delete_users' ) )
 		wp_die(__('You can&#8217;t delete users.'));
 
-	$userids = $_REQUEST['users'];
 	$update = 'del';
 	$delete_count = 0;
 
-	foreach ( (array) $userids as $id) {
-		$id = (int) $id;
-
+	foreach ( $userids as $id ) {
 		if ( ! current_user_can( 'delete_user', $id ) )
 			wp_die(__( 'You can&#8217;t delete that user.' ) );
 
@@ -150,12 +172,10 @@
 		}
 		switch ( $_REQUEST['delete_option'] ) {
 		case 'delete':
-			if ( current_user_can('delete_user', $id) )
-				wp_delete_user($id);
+			wp_delete_user( $id );
 			break;
 		case 'reassign':
-			if ( current_user_can('delete_user', $id) )
-				wp_delete_user($id, $_REQUEST['reassign_user']);
+			wp_delete_user( $id, $_REQUEST['reassign_user'] );
 			break;
 		}
 		++$delete_count;
@@ -182,9 +202,11 @@
 		$errors = new WP_Error( 'edit_users', __( 'You can&#8217;t delete users.' ) );
 
 	if ( empty($_REQUEST['users']) )
-		$userids = array(intval($_REQUEST['user']));
+		$userids = array( intval( $_REQUEST['user'] ) );
 	else
-		$userids = (array) $_REQUEST['users'];
+		$userids = array_map( 'intval', (array) $_REQUEST['users'] );
+
+	add_action( 'admin_head', 'delete_users_add_js' );
 
 	include ('admin-header.php');
 ?>
@@ -195,29 +217,33 @@
 <div class="wrap">
 <?php screen_icon(); ?>
 <h2><?php _e('Delete Users'); ?></h2>
+<?php if ( isset( $_REQUEST['error'] ) ) : ?>
+<div class="error">
+	<p><strong><?php _e( 'ERROR:' ); ?></strong> <?php _e( 'Please select an option.' ); ?></p>
+</div>
+<?php endif; ?>
 <p><?php echo _n( 'You have specified this user for deletion:', 'You have specified these users for deletion:', count( $userids ) ); ?></p>
 <ul>
 <?php
 	$go_delete = 0;
 	foreach ( $userids as $id ) {
-		$id = (int) $id;
-		$user = new WP_User($id);
+		$user = get_userdata( $id );
 		if ( $id == $current_user->ID ) {
-			echo "<li>" . sprintf(__('ID #%1s: %2s <strong>The current user will not be deleted.</strong>'), $id, $user->user_login) . "</li>\n";
+			echo "<li>" . sprintf(__('ID #%1$s: %2$s <strong>The current user will not be deleted.</strong>'), $id, $user->user_login) . "</li>\n";
 		} else {
-			echo "<li><input type=\"hidden\" name=\"users[]\" value=\"" . esc_attr($id) . "\" />" . sprintf(__('ID #%1s: %2s'), $id, $user->user_login) . "</li>\n";
+			echo "<li><input type=\"hidden\" name=\"users[]\" value=\"" . esc_attr($id) . "\" />" . sprintf(__('ID #%1$s: %2$s'), $id, $user->user_login) . "</li>\n";
 			$go_delete++;
 		}
 	}
 	?>
 	</ul>
 <?php if ( $go_delete ) : ?>
-	<fieldset><p><legend><?php echo _n( 'What should be done with posts and links owned by this user?', 'What should be done with posts and links owned by these users?', $go_delete ); ?></legend></p>
+	<fieldset><p><legend><?php echo _n( 'What should be done with posts owned by this user?', 'What should be done with posts owned by these users?', $go_delete ); ?></legend></p>
 	<ul style="list-style:none;">
-		<li><label><input type="radio" id="delete_option0" name="delete_option" value="delete" checked="checked" />
-		<?php _e('Delete all posts and links.'); ?></label></li>
+		<li><label><input type="radio" id="delete_option0" name="delete_option" value="delete" />
+		<?php _e('Delete all posts.'); ?></label></li>
 		<li><input type="radio" id="delete_option1" name="delete_option" value="reassign" />
-		<?php echo '<label for="delete_option1">'.__('Attribute all posts and links to:').'</label>';
+		<?php echo '<label for="delete_option1">' . __( 'Attribute all posts to:' ) . '</label> ';
 		wp_dropdown_users( array( 'name' => 'reassign_user', 'exclude' => array_diff( $userids, array($current_user->ID) ) ) ); ?></li>
 	</ul></fieldset>
 	<input type="hidden" name="action" value="dodelete" />
@@ -302,13 +328,13 @@
 	$go_remove = false;
  	foreach ( $userids as $id ) {
 		$id = (int) $id;
- 		$user = new WP_User($id);
+ 		$user = get_userdata( $id );
 		if ( $id == $current_user->ID && !is_super_admin() ) {
-			echo "<li>" . sprintf(__('ID #%1s: %2s <strong>The current user will not be removed.</strong>'), $id, $user->user_login) . "</li>\n";
+			echo "<li>" . sprintf(__('ID #%1$s: %2$s <strong>The current user will not be removed.</strong>'), $id, $user->user_login) . "</li>\n";
 		} elseif ( !current_user_can('remove_user', $id) ) {
-			echo "<li>" . sprintf(__('ID #%1s: %2s <strong>You don\'t have permission to remove this user.</strong>'), $id, $user->user_login) . "</li>\n";
+			echo "<li>" . sprintf(__('ID #%1$s: %2$s <strong>You don\'t have permission to remove this user.</strong>'), $id, $user->user_login) . "</li>\n";
 		} else {
-			echo "<li><input type=\"hidden\" name=\"users[]\" value=\"{$id}\" />" . sprintf(__('ID #%1s: %2s'), $id, $user->user_login) . "</li>\n";
+			echo "<li><input type=\"hidden\" name=\"users[]\" value=\"{$id}\" />" . sprintf(__('ID #%1$s: %2$s'), $id, $user->user_login) . "</li>\n";
 			$go_remove = true;
 		}
  	}