[bira]

this:

  $uignore = $DB_site->query_first("SELECT uignore FROM user WHERE username='$post[username]'");

should be this:

  $uignore = $DB_site->query_first("SELECT uignore FROM user WHERE userid='$post[userid]'");

Or you will get lots of mysql errors for users whose username includes '

I'm also unsure why you would need to run this query to begin with. You need to find a way to get the global ignored users and cache them, rather than running this extra query for every thread