Index: wp-admin/includes/class-wp-upgrader.php
===================================================================
--- wp-admin/includes/class-wp-upgrader.php	(revision 12830)
+++ wp-admin/includes/class-wp-upgrader.php	(working copy)
@@ -464,6 +464,7 @@
 
 		$this->maintenance_mode(true);
 
+		$results = array();
 		$all = count($plugins);
 		$i = 1;
 		foreach ( $plugins as $plugin ) {
Index: wp-admin/plugins.php
===================================================================
--- wp-admin/plugins.php	(revision 12830)
+++ wp-admin/plugins.php	(working copy)
@@ -83,6 +83,48 @@
 			wp_redirect("plugins.php?activate-multi=true&plugin_status=$status&paged=$page");
 			exit;
 			break;
+		case 'update-selected' :
+			if ( ! current_user_can( 'update_plugins' ) )
+				wp_die( __( 'You do not have sufficient permissions to update plugins for this blog.' ) );
+
+			check_admin_referer( 'bulk-manage-plugins' );
+
+			if ( isset( $_GET['plugins'] ) )
+				$plugins = explode( ',', $_GET['plugins'] );
+			elseif ( isset( $_POST['checked'] ) )
+				$plugins = (array) $_POST['checked'];
+			else
+				break;
+
+			if ( empty( $plugins ) )
+					break;
+
+			// We'll be passing all checked plugins as long as at least one is out of date.
+			$_plugins = $plugins;
+			$current = get_site_transient( 'update_plugins' );
+			foreach ( $_plugins as $k => $v ) {
+				if ( ! isset( $current->response[ $v ] ) )
+					unset( $_plugins[ $k ] );
+			}
+			unset( $current );
+			// If all checked plugins are up to date
+			if ( empty( $_plugins ) )
+				break;
+
+			require_once( ABSPATH . 'wp-admin/includes/class-wp-upgrader.php' );
+			require_once( 'admin-header.php' );
+			
+			$url = 'plugins.php?action=upgrade-selected&plugins=' . urlencode( join( ',', $plugins ) );
+			$title = __( 'Upgrade Plugins' );
+			$nonce = 'bulk-manage-plugins';
+			$parent_file = 'plugins.php';
+
+			$upgrader = new Plugin_Upgrader( new Plugin_Upgrader_Skin( compact( 'title', 'nonce', 'url' ) ) );
+			$upgrader->bulk_upgrade( $plugins );
+
+			require_once( 'admin-footer.php' );
+			exit;
+			break;
 		case 'error_scrape':
 			if ( ! current_user_can('activate_plugins') )
 				wp_die(__('You do not have sufficient permissions to activate plugins for this blog.'));
@@ -281,6 +323,8 @@
 	<div id="message" class="updated"><p><?php _e('Plugin <strong>deactivated</strong>.') ?></p></div>
 <?php elseif (isset($_GET['deactivate-multi'])) : ?>
 	<div id="message" class="updated"><p><?php _e('Selected plugins <strong>deactivated</strong>.'); ?></p></div>
+<?php elseif ( 'update-selected' == $action ) : ?>
+	<div id="message" class="updated"><p><?php _e('No out of date plugins were selected.'); ?></p></div>
 <?php endif; ?>
 
 <div class="wrap">
@@ -500,6 +544,9 @@
 	<?php if ( 'inactive' != $context && 'recent' != $context ) : ?>
 			<option value="deactivate-selected"><?php _e('Deactivate'); ?></option>
 	<?php endif; ?>
+	<?php if ( current_user_can( 'update_plugins' ) ) : ?>
+			<option value="update-selected"><?php _e( 'Upgrade' ); ?></option>
+	<?php endif; ?>
 	<?php if ( current_user_can('delete_plugins') && ( 'active' != $context ) ) : ?>
 			<option value="delete-selected"><?php _e('Delete'); ?></option>
 	<?php endif; ?>
Index: wp-admin/update-core.php
===================================================================
--- wp-admin/update-core.php	(revision 12830)
+++ wp-admin/update-core.php	(working copy)
@@ -351,21 +351,21 @@
 }
 
 function do_plugin_upgrade() {
-	include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
-
-	if ( isset($_GET['plugins']) ) {
-		$plugins = explode(',', $_GET['plugins']);
-	} elseif ( isset($_POST['checked']) ) {
+	if ( isset( $_GET['plugins'] ) ) {
+		$plugins = explode( ',', $_GET['plugins'] );
+	} elseif ( isset( $_POST['checked'] ) ) {
 		$plugins = (array) $_POST['checked'];
 	} else {
 		// Nothing to do.
 		return;
 	}
-	$url = 'update-core.php?action=do-plugin-upgrade&amp;plugins=' . urlencode(join(',', $plugins));
-	$title = __('Upgrade Plugins');
+
+	include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
+	$url = 'update-core.php?action=do-plugin-upgrade&amp;plugins=' . urlencode( implode( ',', $plugins ) );
+	$title = __( 'Upgrade Plugins' );
 	$nonce = 'upgrade-core';
-	$upgrader = new Plugin_Upgrader( new Plugin_Upgrader_Skin( compact('title', 'nonce', 'url', 'plugin') ) );
-	$upgrader->bulk_upgrade($plugins);
+	$upgrader = new Plugin_Upgrader( new Plugin_Upgrader_Skin( compact( 'title', 'nonce', 'url' ) ) );
+	$upgrader->bulk_upgrade( $plugins );
 }
 
 $action = isset($_GET['action']) ? $_GET['action'] : 'upgrade-core';