Index: wp-admin/includes/class-wp-plugin-install-list-table.php
===================================================================
--- wp-admin/includes/class-wp-plugin-install-list-table.php	(revision 29084)
+++ wp-admin/includes/class-wp-plugin-install-list-table.php	(working copy)
@@ -374,13 +374,13 @@
 				switch ( $status['status'] ) {
 					case 'install':
 						if ( $status['url'] ) {
-							$action_links[] = '<a class="install-now button" href="' . $status['url'] . '" aria-labelledby="' . $plugin['slug'] . '">' . __( 'Install Now' ) . '</a>';
+							$action_links[] = '<a class="install-now button" href="' . $status['url'] . '" aria-label="' . __( 'Install ' . $title . ' now' ) . '">' . __( 'Install Now' ) . '</a>';
 						}
 
 						break;
 					case 'update_available':
 						if ( $status['url'] ) {
-							$action_links[] = '<a class="button" href="' . $status['url'] . '" aria-labelledby="' . $plugin['slug'] . '">' . __( 'Update Now' ) . '</a>';
+							$action_links[] = '<a class="button" href="' . $status['url'] . '" aria-label="' . __( 'Update ' . $title . ' now' ) . '">' . __( 'Update Now' ) . '</a>';
 						}
 
 						break;
@@ -394,7 +394,7 @@
 			$details_link   = self_admin_url( 'plugin-install.php?tab=plugin-information&amp;plugin=' . $plugin['slug'] .
 								'&amp;TB_iframe=true&amp;width=600&amp;height=550' );
 
-			$action_links[] = '<a href="' . esc_url( $details_link ) . '" class="thickbox" aria-labelledby="' . $plugin['slug'] . '" data-title="' . esc_attr( $name ) . '">' . __( 'More Details' ) . '</a>';
+			$action_links[] = '<a href="' . esc_url( $details_link ) . '" class="thickbox" aria-label="' . __( 'More details about ' . $title ) . '" data-title="' . esc_attr( $name ) . '">' . __( 'More Details' ) . '</a>';
 
 
 			/**