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$objQuery =& SC_Query_Ex::getSingletonInstance();
↓
$objQuery = SC_Query_Ex::getSingletonInstance();
に統一。
元々はPHP4互換のために参照代入にしていたと思うが、2.12以降でPHP4非対応になって久しい。
現状は、参照代入している箇所としていない箇所が混在しており、もはや不要かと思われるので参照代入をしないように統一。