diff --git a/inc/functions.php b/inc/functions.php
index 1c60393c..7ed3af5a 100755
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -2068,51 +2068,62 @@ function buildThread($id, $return = false, $mod = false) {
 		cache::delete("thread_{$board['uri']}_{$id}");
 	}
 
-	$query = prepare(sprintf("SELECT * FROM ``posts_%s`` WHERE (`thread` IS NULL AND `id` = :id) OR `thread` = :id ORDER BY `thread`,`id`", $board['uri']));
-	$query->bindValue(':id', $id, PDO::PARAM_INT);
-	$query->execute() or error(db_error($query));
+	if (!$config['smart_build'] || $return || $mod) {
+		$query = prepare(sprintf("SELECT * FROM ``posts_%s`` WHERE (`thread` IS NULL AND `id` = :id) OR `thread` = :id ORDER BY `thread`,`id`", $board['uri']));
+		$query->bindValue(':id', $id, PDO::PARAM_INT);
+		$query->execute() or error(db_error($query));
 
-	while ($post = $query->fetch(PDO::FETCH_ASSOC)) {
-		if (!isset($thread)) {
-			$thread = new Thread($post, $mod ? '?/' : $config['root'], $mod);
-		} else {
-			$thread->add(new Post($post, $mod ? '?/' : $config['root'], $mod));
+		while ($post = $query->fetch(PDO::FETCH_ASSOC)) {
+			if (!isset($thread)) {
+				$thread = new Thread($post, $mod ? '?/' : $config['root'], $mod);
+			} else {
+				$thread->add(new Post($post, $mod ? '?/' : $config['root'], $mod));
+			}
 		}
-	}
 
-	// Check if any posts were found
-	if (!isset($thread))
-		error($config['error']['nonexistant']);
+		// Check if any posts were found
+		if (!isset($thread))
+			error($config['error']['nonexistant']);
 	
-	$hasnoko50 = $thread->postCount() >= $config['noko50_min'];
-	$antibot = $mod || $return ? false : create_antibot($board['uri'], $id);
-
-	$body = Element('thread.html', array(
-		'board' => $board,
-		'thread' => $thread,
-		'body' => $thread->build(),
-		'config' => $config,
-		'id' => $id,
-		'mod' => $mod,
-		'hasnoko50' => $hasnoko50,
-		'isnoko50' => false,
-		'antibot' => $antibot,
-		'boardlist' => createBoardlist($mod),
-		'return' => ($mod ? '?' . $board['url'] . $config['file_index'] : $config['root'] . $board['dir'] . $config['file_index'])
-	));
-
-	if ($config['try_smarter'] && !$mod)
-		$build_pages[] = thread_find_page($id);
+		$hasnoko50 = $thread->postCount() >= $config['noko50_min'];
+		$antibot = $mod || $return ? false : create_antibot($board['uri'], $id);
 
-	// json api
-	if ($config['api']['enabled']) {
-		$api = new Api();
-		$json = json_encode($api->translateThread($thread));
+		$body = Element('thread.html', array(
+			'board' => $board,
+			'thread' => $thread,
+			'body' => $thread->build(),
+			'config' => $config,
+			'id' => $id,
+			'mod' => $mod,
+			'hasnoko50' => $hasnoko50,
+			'isnoko50' => false,
+			'antibot' => $antibot,
+			'boardlist' => createBoardlist($mod),
+			'return' => ($mod ? '?' . $board['url'] . $config['file_index'] : $config['root'] . $board['dir'] . $config['file_index'])
+		));
+
+		if ($config['try_smarter'] && !$mod)
+			$build_pages[] = thread_find_page($id);
+
+		// json api
+		if ($config['api']['enabled']) {
+			$api = new Api();
+			$json = json_encode($api->translateThread($thread));
+			$jsonFilename = $board['dir'] . $config['dir']['res'] . $id . '.json';
+			file_write($jsonFilename, $json);
+		}
+	}
+	else {
 		$jsonFilename = $board['dir'] . $config['dir']['res'] . $id . '.json';
-		file_write($jsonFilename, $json);
+		file_unlink($jsonFilename);
 	}
 
-	if ($return) {
+	if ($config['smart_build'] && !$return && !$mod) {
+		$noko50fn = $board['dir'] . $config['dir']['res'] . link_for(array('id' => $id), true);
+		file_unlink($noko50fn);
+
+		file_unlink($board['dir'] . $config['dir']['res'] . link_for(array('id' => $id)));
+	} else if ($return) {
 		return $body;
 	} else {
 		$noko50fn = $board['dir'] . $config['dir']['res'] . link_for($thread, true);