krashx6 on "[Plugin: Contact Form 7] Checkboxes outputting "Array""

Since the update, my form's check boxes started outputting "Array" in the email rather than which box they selected.

My code is below.
On the Form: [checkbox checkbox-977 "Medical" "Dental"]
In the Email: [checkbox-977]

Any ideas? I've tried remaking the form.

http://wordpress.org/plugins/contact-form-7/