Index: wp-admin/includes/plugin-install.php
===================================================================
--- wp-admin/includes/plugin-install.php	(revision 9160)
+++ wp-admin/includes/plugin-install.php	(working copy)
@@ -436,7 +436,7 @@
 <?php endif; ?>
 		</ul>
 		<h2><?php _e('Average Rating') ?></h2>
-		<div class="star-holder" title="<?php printf(__('(based on %d ratings)'), $api->num_ratings) ?>">
+		<div class="star-holder" title="<?php printf(__ngettext(__('(based on %d rating)'), __('(based on %d ratings)'), $api->num_ratings), $api->num_ratings) ?>">
 			<div class="star star-rating" style="width: <?php echo attribute_escape($api->rating) ?>px"></div>
 			<div class="star star5"><img src="<?php echo admin_url('images/star.gif'); ?>" alt="<?php _e('5 stars') ?>" /></div>
 			<div class="star star4"><img src="<?php echo admin_url('images/star.gif'); ?>" alt="<?php _e('4 stars') ?>" /></div>
@@ -444,7 +444,7 @@
 			<div class="star star2"><img src="<?php echo admin_url('images/star.gif'); ?>" alt="<?php _e('2 stars') ?>" /></div>
 			<div class="star star1"><img src="<?php echo admin_url('images/star.gif'); ?>" alt="<?php _e('1 star') ?>" /></div>
 		</div>
-		<small><?php printf(__('(based on %d ratings)'), $api->num_ratings) ?></small>
+		<small><?php printf(__ngettext(__('(based on %d rating)'), __('(based on %d ratings)'), $api->num_ratings), $api->num_ratings) ?></small>
 	</div>
 	<div id="section-holder" class="wrap">
 	<?php