This is a quick fix to make the "For orders of $xx.xx or more" on the shipping page update with the amount you put into the admin area.

In catalog/includes/languages/english/modules/shipping/freeamount.php:
Line 18 - change MODULE_ORDER_TOTAL_SHIPPING_FREE_SHIPPING_OVER to MODULE_SHIPPING_FREEAMOUNT_AMOUNT

*note, only that file is included*

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