I also like the design and layout of the new viewer, but there is one bug (or what seems like a bug) that is stopping me from switching from the old classic viewer.
It relates to scrolling in pop-ups. The editing layer I have has four attributes, which gives the editing pop-up a scrollbar. If I scroll using the mouse-wheel to scroll down in the pop-up, when I reach the bottom of the pop-up, the map panel on the right-hand side of the map also scrolls and quickly changes to the next map panel (Details). The pop-up for the edit then closes and I have to change the map panel back to Edit and click on the feature again. The same thing happens with an attribute with a domain with many values. A scroll window appears to scroll through the available attributes. I scroll, but once I reach the bottom of the dropdown list, the map panel quickly changes to the next one, therefore closing the pop-up again. Its very frustrating and happens in both IE and Chrome.
