Border around the menu (again)

I’ve got a problem when I use the following code, which I got from here:

.navbar .navbar-inner {
-webkit-box-shadow: 0px 0px 0px ;
-moz-box-shadow: 0px 0px 0px ;
box-shadow: 0px 0px 0px transparent;
background:none
}

In Firefox the social links at the top and at the bottom are shown without their images (I mean you can only see something weird).
It doesn’t happen in the dashboard, only when I call the website from its domain name.

Any clues about it??

Thank you in advance!!