have you tried embedding the code?
Click the picture on the above diagram next to the magnifying glass (bottom left), and click 'embed code'.
Update: Oh, I'm tired - you just want the picture. Yes, there is a great way. Snagit for windows will let you capture any picture on your screen. It works great for me.
I have a small chess blog on Tumblr. Whenever I try to copy a diagram of a chess position I can never save it as a photo or a picture to paste on Tumblr or my Chess.com blog. Is there a trick to making this happen or do you need a special software program? Anyone helpme? I have this problem with diagrams from Chess.com, Hiarcs, Chessbase, Facebook, etc... I would love to post on my blog games or positions of personal interest. Any comments or suggestions would help!