Index: wp-content/themes/twentyten/loop.php
===================================================================
--- wp-content/themes/twentyten/loop.php	(revision 17026)
+++ wp-content/themes/twentyten/loop.php	(working copy)
@@ -82,9 +82,10 @@
 						<div class="gallery-thumb">
 							<a class="size-thumbnail" href="<?php the_permalink(); ?>"><?php echo $image_img_tag; ?></a>
 						</div><!-- .gallery-thumb -->
-						<p><em><?php printf( __( 'This gallery contains <a %1$s>%2$s photos</a>.', 'twentyten' ),
-								'href="' . get_permalink() . '" title="' . sprintf( esc_attr__( 'Permalink to %s', 'twentyten' ), the_title_attribute( 'echo=0' ) ) . '" rel="bookmark"',
-								$total_images
+						<p><em><?php /* translators: 1: permalink, 2: post title, 3: number of photos */ printf( __( 'This gallery contains <a href="%1$s" title="Permalink to %2$s" rel="bookmark">%3$s</a>.', 'twentyten' ),
+								get_permalink(),
+								the_title_attribute( 'echo=0' ),
+								sprintf( _n( '%s photo', '%s photos', $total_images ), number_format_i18n( $total_images ) )
 							); ?></em></p>
 				<?php endif; ?>
 						<?php the_excerpt(); ?>