MySQL Unbuffered Query Behavior Change

I was previously on PHP 5.1.6 and was using the following code: $dbr = mysql_unbuffered_query($query, $this->con); while($row = mysql_fetch_array($dbr, $assoc ? MYSQL_ASSOC : MYSQL_NUM)) $this->result[] = $row; $this->rows = mysql_num_rows($dbr); It worked properly. The documentation at http://www.php.net/manual/en/function.mysql-num-rows.php indicates that mysql_num_rows won't return the correct result on unbuffered queries until all of the rows had been fetched, but since I was looping through and fetching all rows with mysql_fetch_array, it worked properly and wasn't a problem. I've upgraded to PHP 5.3.5 and now mysql_num_rows always returns 0. I am fetching all rows before calling mysql_num_rows, just like the documentation says to do, so mysql_num_rows should return the correct result. Why is it not? Is the documentation wrong now (should it have been updated to say that mysql_num_rows now NEVER works with unbuffered queries instead of saying you have to fetch all rows first)? Is there a bug in PHP? Or am I doing something wrong and it just coincidentally worked before? Thanks, Nick