random background appears outside homepage (chrome)

Hello,

i just started working on my photography website and I have found a problem that only happens with my chrome browser. My background on the homepage is perfect, but when I go to any other page, as gallery, it changes and there is one that I do not want. I want to keep it blank. It doesn’t show in IE or in my ipad. I am using the photocrati theme

sergiomartin.photography