[Events +] Events+ Paypal error

All of a sudden when one goes to pay for an event and taken to paypal you get this error: https://www.paypal.com/webapps/shoppingcart/error?flowlogging_id=ab5e98b23cb60&code=AMOUNT_ERROR

If I look at the paypal code generated by the plugin there is a $ included with the amount passed to paypal: <input type="hidden" name="amount" value="$10.00"> - I think this might be the issue, but no idea how to fix it.