Here’s a screenshot of the recent update blog:
Turns out this roll-out was just for a beta group. Many initially believed it would be applied across the board. Merchants should check their Yahoo! Stores to make sure nothing was unintentionally affected. Out of the thousands of stores we’ve built, only a few merchants contacted us about looking into problems that may (or may not) have cropped up as a result of the recent update. From our findings thus far, initial testing should include custom order and mobile feed systems.
Need us to check your Yahoo! Store for bugs, let us know.