Hi everyone.
Bad news: we found another bug, so the merchant wave is delayed.
Good news: the live stores are safe and sound
The "wave" approach pays off. So,
it's a developer wave of v5.2.9 now, and I hope it will be followed by a merchant wave of 5.2.9, not by a dev wave of 5.2.10!
We're sorry for the inconvenience caused.