Minimal nature theme with photography:"Nature" by backonthebus.
With white link text,black toolbar and black tabs that glow when hovered. Image is 2048X1370 so it works with large screens as well.
Hope you'll like it!
Creative Commons License:Non-commercial ,Attribution.
Icon:qubodup, http://qubodup.net. Licence:Public Domain.
20140214 updated with dark grey background tabs.