The second change in the Market brings the ability for you to give an app a "+1" on its listing page. Click the "+1" button and it turns blue to show that you have successfully "+1'd" the app. Other than these two changes and some minor cosmetic differences on the Android Market home page, everything else is just about the same.
We should add that this additional update is only available for those who have already experienced the big Android Market update from a few weeks ago as we reported. We have seen some complaints from those overseas who are claiming that they have yet to receive the first update for the Market.