diff -ur -U 5 mantisbt-1.3.0-beta.3\core\database_api.php mantisbt-1.3.0-beta.3-mspl1\core\database_api.php
--- mantisbt-1.3.0-beta.3\core\database_api.php	Sun Sep 06 14:10:14 2015
+++ mantisbt-1.3.0-beta.3-mspl1\core\database_api.php	Tue Sep 08 14:03:14 2015
@@ -802,11 +802,12 @@
 	global $g_db;
 	$t_db_type = config_get_global( 'db_type' );
 
 	switch( $t_db_type ) {
 		case 'mssql':
-		case 'mssqlnative':
+		# XXX: Is this function even needed now? All of its instances are used in parameterized SQL queries (db_param())
+		#case 'mssqlnative':  # Definitely do not need to encode varbinary in parameterized SQL queries with MS sqldrv v3.2 (php_sqlsrv_56_nts.dll)
 		case 'odbc_mssql':
 		case 'ado_mssql':
 			$t_content = unpack( 'H*hex', $p_string );
 			return '0x' . $t_content['hex'];
 			break;