I've had this issue intermittently, but seems to be happening every transaction now...
All records are being captured and emails sending, but users come back from Auth.net to a white page with the same "array" message as one of my previous posts..
Not sure if it's to do with the changes on auth.net but wanted to see if there's a fix i can try. Uploaded latest package available, running most recent version of Joomla.
If you are seeing this, then I don't think you really have the latest DT Register in place. You should be running Joomla 3.5.1 and DT Register 3.1.7a. If that's what you have, submit a ticket with admin access, but no one has reported such problems since the more recent updates.
Nathan is no longer affiliated with DTH since the recent acquisition. You can connect with him and get any type of Joomla website help at
www.JoomlaEmployee.com
.