Subject php 5.3.9 released with relevant Firebird changes
Author mariuz
http://www.php.net/archive/2012.php#id2012-01-11-1

Here are the relevant Firebird changes
http://php.net/ChangeLog-5.php#5.3.9

PDO Firebird:
Fixed bug #48877 ("bindValue" and "bindParam" do not work for PDO Firebird).
Fixed bug #47415 (PDO_Firebird segfaults when passing lowercased column name to bindColumn).
Fixed bug #53280 (PDO_Firebird segfaults if query column count less than param count). (Mariuz)