[balinor]

Remove this bit of code in /modules/Product_Options/customer_options.tpl:

{if $v.is_modifier eq 'Y' && $o.price_modifier ne 0} ({if $o.modifier_type ne '%'}{include file="currency.tpl" value=$o.price_modifier display_sign=1}{else}{$o.price_modifier}%{/if}){/if}