Don't update to 4.2.1 yet!

Just updated to 4.2.1 and all of my Relationships got deleted. Rolled back and everything is fine.

Before 4.2.1 update: http://imgur.com/dffRjGl
After 4.2.1 update: http://imgur.com/3N3Bs1R

I would like to post in the official ACF Bug Report forum, but new posts are disabled during non-business hours, so I’m posting here.

http://wordpress.org/plugins/advanced-custom-fields/