tammyhart/Reusable-Custom-WordPress-Meta-Boxes — pull request #37 by RobVermeer (2013-03-09 11:27:18+00:00)
Title: Fixed deleteing meta

delete_post_meta couldn't be reached, so meta field still existed in
database as empty string

btw: diff looks like every line is changed, but only the if statement in save_box is changed.