A small change was made to Better Together to allow the new One to Many feature to properly interoperate with Checkout Candy. If you don't use Checkout Candy, you don't need this update.
The error looks something like this:
Code:
PHP Warning: Missing argument 3 for ot_better_together::get_discount(), called in /includes/functions/extra_functions/checkout_candy.php on line 22 and defined in /includes/modules/order_total/ot_better_together.php on line 295
Version 2.5.1 of Better Together fixes this issue.
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