Chrome Renders CSS Differently Online vs Offline?

Question

I'm having a problem with Chrome rendering my page fine when loaded locally, but something goes wrong once the page is online. The first thing I did was check Safari, because they both share the same rendering engine. Safari renders my page fine.

Clicking on a link on the page and pressing the back button causes the page to load fine as well.

Here is an image showing how the page loads locally on Chrome:

And here the header is pushed down once the page is online:

Here is the relevant html:

<!-- header -->
    <div id="header2">
        <a href="#"><img src="images/detailpages/logo.png" alt="logo" /></a>
        <ul>
            <li><a href="#">Features</a></li>
            <li><a href="#">Pricing</a></li>
            <li class="blue"><a href="#">Sign Up</a><a href="#">Log In</a></li>
            <li><form><input type="text" name="form" placeholder="type another channel" id="navsearch" /><img src="images/detailpages/search.png" alt="search" /></form></li>
        </ul>
    </div>
<!-- end header -->

And CSS:

#header2 {
position: relative;
z-index: 999;
height: 40px;
width: 100%;
background: #000;
box-shadow: 0em 0em 0.5em #000;
        -webkit-box-shadow: 0em 0em 0.5em #000; /* safari */
/* header nav type */
font-family: "Varela Round", Helvetica, Arial, sans-serif;
font-size: 15px;
}

#header2 ul {
float: right;
list-style-type: none;
}

#header2 li {
display: block;
float: left;
height: 32px;
margin: 10px 16px 0;
}
/* sign up/log in button */
#header2 li.blue {
  background: url('../images/detailpages/login.png');
  width: 170px;
  height: 40px;
  margin: 0;
}
#header2 li.blue a {
    display: block;
    float: left;
    margin: 10px 3px 0 24px;
}
#header2 input {
  height: 22px;
  width: 220px;
  padding: 0 8px;
  font-family:  "Varela Round", Helvetica, Arial, sans-serif;
  font-size: 14px;
  color: #333;
}
#header2 form img {
  display: block;
  float: right;
  padding-left: 5px;
}

This guy had the same problem but it doesn't look like there was a solution: CSS rendering in Chrome differs online from offline

Answer 1

My bet is you have (maybe accidentally) changed Chrome's Zoom settings for either your online or your offline domain.

Press Ctrl + 0 to reset the zoom level to find out.