When I tried to set up a new BB, I got this error (after putting "ini_set("display_errors", TRUE); error_reporting(E_ALL);" to index.php):
Fatal error: Call to undefined method DBLayer::query_build() in /Library/WebServer/Documents/punbb-1.3-dev/upload/include/functions.php on line 183
I took the function from mysql.php and it seems to work so far.