CSS mobile version of web site is zoomed in when loaded (only whatchable with mobile device)

I have set up a mobile web site of http://bit.ly/1Hwbn94 ... but for an unknown reason it always seems to be zoomed in just A LITTLE BIT (maybe 1 - 3%?). There is always missing some milimetres of the right side and I can zoom out with a pinch.

It also happens, when I am on the site and clicking another page. It just does not want to show the complete page from the beginning, although I have set the boxes to width: 100%;.

But I do not want to forbid zooming! I just want to have it all seen on initial loading/visiting.

Btw, I have set

<meta name="viewport" content="width=device-width, initial-scale=1">

Without it my layout goes bananas on mobile devices and setting it to a lower initial-scale does not help either. There is till missing a little bit on the right side.

So, I think it has to do with some CSS values or so. Maybe I have set something over 100% width or so? Because if I zoom/pinch out after loading, it works just fine ... until loading another page of the web site, of course.

Thank you in advance, mates.