Cabinet doors "Pulling apart" - how to repair?

Take the door off its hinges. Get a ratchet strap and some quality wood glue, Very carefully pull the joint open, apply a liberal amount of glue. Push together, attach the ratchet strap and tighten until the door is back together. Checking with a carpenters square to ensure it is square. Wipe off all excess glue that squeezes out. Let the door sit for 24 hours. Remove the strap and reattach the door. If you are careful, no one will ever know.