localize_item() thinks all likes on posts are likes on comments because we didn't pass any info in the activity object to distinguish them from each other.

include/conversation.php

@@ -137,7 +137,7 @@ function localize_item(&$item){
 			case ACTIVITY_OBJ_NOTE:
 			default:
 				$post_type = t('status');
-				if($obj['id'] != $item['mid'])
+				if($obj['mid'] != $obj['parent_mid'])
 					$post_type = t('comment');
 				break;
 		}

mod/like.php

@@ -110,6 +110,7 @@ function like_content(&$a) {
 	$obj = json_encode(array(
 		'type'    => $objtype,
 		'id'      => $item['mid'],
+		'parent'  => (($item['thr_parent']) ? $item['thr_parent'] : $item['parent_mid']),
 		'link'    => $links,
 		'title'   => $item['title'],
 		'content' => $item['body'],