Checkout - clicking refresh icon a number of times

Warning: reset() [function.reset]: Passed variable is not an array or object in /home/demo/www/administrator/components/com_hikashop/classes/currency.php on line 1578

Fatal error: __clone method called on non-object in /home/demo/www/administrator/components/com_hikashop/classes/currency.php on line 1578

Please change the line:
$additional_total->prices = array(clone(reset($total->prices)));

to:
if(is_array($total->prices)) $additional_total->prices = array(clone(reset($total->prices)));

in the file administrator/components/com_hikashop/classes/currency.php and that should solve the problem.