We recently upgraded to 1.9 and have reset up the Authorize.net cc processing. When a client went to submit an order they got through the onepage form until they got to the payment step. They added their info and hit continue and it didn't do anything. We have checked and there are no errors anywhere and there is nothing saying that our setup is wrong. The site is sturinotrotta.com. Please help!
A couple of questions:
1- Is error logging enabled in your Magento instance?
2- Have you reviewed the var/log files?
3- Have you reviewed the browser console for JS errors?