Right Click to Save Images
I spent way too long trying to figure out how to right click and save an image (like you do almost everywhere else on every operating system in almost every other app) in the shadowboxed view before I realized you have to "Download" the image via the arrow icon at the top of the window first. Why isn't "Save Image" a context menu option? Or "Download Image"? Or you could even make the existing "Copy Image" work system wide so I can just paste to my desktop like I tried to do a few times.
Save as too. There's no indication where it saves to!