aliso/atg-meta-box — pull request #1 by machouinard (2014-05-24 02:18:10+00:00)
Title: Set $single to false for checkboxes and select lists in get_post_meta()

I noticed checkboxes and select lists were only being populated with a single stored value. Setting that 3rd arg in get_post_meta to false for those types seems to work for me.