I’m also having a similar problem. All the images I’ve tried on the fancy background zoom and get cut-off and moved to the right. I’ve attached a screenshot of what my blog image looks like…
This is a link to the actual file – it’s plenty big enough that it shouldn’t need to be zoomed or cropped…
http://www.fusepointe.com/wp-content/uploads/2013/11/desk2-e1387061534192.jpg