elliotcondon/acf — pull request #262 by TomHanra (2014-04-14 19:27:46+00:00)
Title: Handling case where other code unsafely calls save_post action in same request as an update to field_group

Adding a check to field_group's field deletion logic to prevent it deleting everything when something else causes the save_post action to be triggered as part of the same request. Everything else is already safe as the relevant post variables are being unset.