PHP 5.2.7 contains an incorrect change to the FILTER_UNSAFE_RAW functionality, and unintentionally disables magic_quotes_gpc regardless of the actual magic_quotes_gpc setting, which might make it easier for context-dependent attackers to conduct SQL injection attacks and unspecified other attacks.
http://www.securitytracker.com/id?1021393
http://www.securityfocus.com/bid/32673
http://www.php.net/archive/2008.php#id2008-12-08-1
http://www.php.net/archive/2008.php#id2008-12-07-1