Issue Resizing Header Logo

First, I love how this plugin has helped with images for mobile users. My only issue is we are having issues with it re-sizing the top header image/logo for the site. Not being experienced in CSS coding, I am not sure how to correct this problem. I have noticed it is only reducing the logo size when viewing with Google Chrome. Logo is not effected in Firefox. Any assistance would be greatly appreciated.

site can be viewed here: http://www.parkerboats.net

http://ww.wp.xz.cn/plugins/wp-fluid-images/