Well in includes/paymentapi/clas_paypal.php line 60 was changed.
From:
Code:
$mc_gross = doubleval($this->registry->GPC['mc_gross']+ ($this->registry->GPC['payment_status'] == 'Canceled_Reversal' ? $vbulletin->GPC['mc_fee'] : 0));
To:
Code:
$mc_gross = doubleval($this->registry->GPC['mc_gross']+ ($this->registry->GPC['payment_status'] == 'Canceled_Reversal' ? $this->registry->GPC['mc_fee'] : 0));
Nothing was changed in payments.php.
Nothing was changed in payment_gateway.php.
So it is pretty easy to figure out where the issue lies.