I have built a website that I thought was free from css errors until I test this on the iPhone. I have a strange problem in that the repeating background images do not stretch fully across the page.
This is what it looks like on an iPhone and full website URL:
Example website

Try this:
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">The problem is the same for if you reduce the width of your browser. The problem is the background IS stretching, but the website is only as wide as the stretched background image. The slidey bit below the logo has a fixed width though and is creating the illusion that the background isn’t stretching far enough.
The above code should fix this issue by making sure that the website zooms to fit the width of the browser.