Whereas before there used to be an easily-overlook-able link saying '1 of x versions of this work' on the right-hand side, you will now see a line of text saying 'multiple versions found - to view list click versions on the right'. This should direct you to the link that will bring up a list of all the different editions available in Oxford, automatically sorted in date order with the newest edition at the top. If there is an e-version, this will be shown on the intitial results page, and will be at the top of the list when you click the link.
There is no change to how books with only one edition display.