Image not displaying in MVC project on server - asp.net-mvc

I am using Bootstrap on an MVC 5 project.
In the bootstrap CSS file, I have an image as a background on the banner. It is not displaying on the server (displays fine on my dev machine).
.navbar-brand {
float: left;
padding: 15px 15px;
font-size: 18px;
line-height: 20px;
background: url('../Content/Images/logo_combined_trans.gif') no-repeat left;display:block;
}
Additional observations:
1) The image displays perfectly on my development machine. Once I publish the files on the server, however, everything else works, except the image does not display.
2) I put the same image in the body of a View in an img tag and it displayed correctly too.
3) Interestingly when I inspected the element it looked like the background property of the CSS is not being read at all, the rest of the properties (float, padding....line-height show correctly).
I tried the following:
1) I gave the DefaultAppPool 'read' access to the Content and Images directories. Still no go.
Is there anything else that needs to be set on the server?
Thanks.

Ok I know what the problem was. I had a bootstrap.min.css which did not have the modifications that I had made to the orignal bootstrap.css. After I removed the min file from the server everything worked.
Also, I tried several versions of the URL and all of the above worked including the original version:
1) background: url('../Content/Images/logo_combined_trans.gif') no-repeat left;display:block;
2) background: url('~/Content/Images/logo_combined_trans.gif') no-repeat left;display:block;
3) background: url('Content/Images/logo_combined_trans.gif') no-repeat left;display:block;

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As of now I'm running into an issue when it comes to testing a website on iOS devices. It seems a DIV element does not carry its overflow:hidden property well. Or at all, really.
This is what the site's layout should be (with the overflow-setting working):
This is what the layout is like on an iOS device:
I've tried many things, such as editing the body and html css overflow and/or position properties, adding a wrapper around the body tag and many more 'mainstream' solutions I came across while googling. None worked, sadly.
The CSS for the item not properly working on iOS is this:
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How'd I know (or at least think) it's the overflow? As soon as I turn it off in the browser through inspecting the element, the issue happens.
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I've been struggling with this for a couple of hours for now, I've tried every solution that could find on the web, but nothing works.
Here is the a css file:
body{
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background-position: 100% 100%;
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Why does a normal web page appear zoomed way out on iOS?

Why does this jsfiddle page appear so far zoomed out when viewed on Mobile Safari on iOS 6.1? I'd expect it to take up the entire width, but it zooms way out instead. I have pretty boring CSS as follows, but I'm missing something.
.foo {
overflow: auto;
overflow-y: hidden;
height: 100px;
-webkit-overflow-scrolling: touch;
white-space: nowrap;
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display: inline-block;
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Add
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Working example (standalone)
Working example (jsfiddle)
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For this to work in jsFiddle, you need to add the meta tag to the CSS pane but wrap it in a </style> / <style type="text/css"> tags so it appears in the head. Also, the ordinary embed sharing link won't work, as everything is wrapped in an iframe, so you need to break out the contents of that directly: .../show/light/
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The small red rounds with number inside are defined as follows:
.countComunicazioni {
position: relative;
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width: 35px;
color: #FFF;
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Just found out myself that the way that chrome 22+ handles z-index has been altered.
Check out this awesome explanation here that I didn't write here...
http://updates.html5rocks.com/2012/09/Stacking-Changes-Coming-to-position-fixed-elements
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