Dear yuri cristodaro,
Because the width of logo is larger than 300px, it is shrunk in the Chrome.
You can change the width of header in the layout file.
Example: left-main-right.xml => go to "templates\sj_worldnews\layouts\left-main-right.xml", finding:
<header2 order="2" id="yt_header">
<positions>
<position width="300px" height="" type="feature">@logo</position>
<position width="680px" height="" type="modules">header2</position>
</positions>
</header2>
=>
<header2 order="2" id="yt_header">
<positions>
<position width="" height="" type="feature">@logo</position>
<position width="" height="" type="modules">header2</position>
</positions>
</header2>
Thanks
