difficult to read - http://i.imgur.com/OGqaEzL.png since the search and navigation follow the scrolling, you could move "Featured Topics" into that bar. the public info tile and photoshop could be moved/changed in size to above the pictures and you could add a third row of pictures to maximize your photo exposure/content. I'm personally not a huge fan of such thin list content and would advise a "fit to screen" approach. I wouldnt make it the full width, but maybe 10-20% margin on the sides.
http://photos4share.com/ is a very amazing site. Specially for me who loves the beauty of nature. Thanks for creating that.
I just tried to look at your site, and it's very buggy right now. I clicked on "Discover" in the header and my screen started to spazz out and nothing loaded. Also, there aren't any images loading on the home page... it's just a white space. The overall layout is very appealing and easy to navigate. I especially like how prominent the search bar is on the home page. Great job!