Thanks for checking that.

When you say "the only difference between the last and current version"...
I guess for me that would be this one:
Updated 12/08/2013 Version 1.5

in comparison to your brand new:
Version: 1.5.5

I'll dig into the CSS then if you think that could be it.
I see I'm loading on that page just these 2:
<link rel="stylesheet" type="text/css" href="includes/stylesheet.css">
<link rel="stylesheet" type="text/css" href="includes/cssjsmenuhover.css" media="all" id="hoverJS">