Weird safari and chrome artifact appearing in my wordpress + Gantry site

can anybody help me understand why a small grid pattern is appearing behind my slider on my wordpress site. it only appears in safari and chrome, but not firefox as far as I can tell. http://wordpress.geospatial-associates.com
GeoLearnAsked:
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Jason C. LevineDon't talk to me.Commented:
There's a CSS element that's doing it:

.rt-showcase-pattern {
background-image: -webkit-linear-gradient(rgba(0,0,0,0.03) 2px, transparent 2px), -webkit-linear-gradient(0, rgba(0,0,0,0.03) 2px, transparent 2px), -webkit-linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px), -webkit-linear-gradient(0, rgba(0,0,0,0.03) 1px, transparent 1px);

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in

http://wordpress.geospatial-associates.com/wp-content/themes/rt_gantry_wp/css-compiled/master-b303c1e5744d1b4f618d61af7361442b.css?ver=4.1.0

I'm assuming only webkit browsers support it so that would be why it only shows up in Chrome/Safari

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Peter HartCommented:
yes - its supposed to be there.
the browsers that don't show it are not up to date.

its in a file:
http://wordpress.geospatial-associates.com/wp-content/themes/rt_gantry_wp/css-compiled/master-b303c1e5744d1b4f618d61af7361442b.css

this is the code:
.rt-showcase-pattern {
background-image: -webkit-linear-gradient(rgba(0,0,0,0.03) 2px, transparent 2px), -webkit-linear-gradient(0, rgba(0,0,0,0.03) 2px, transparent 2px), -webkit-linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px), -webkit-linear-gradient(0, rgba(0,0,0,0.03) 1px, transparent 1px);
background-size: 80px 80px, 80px 80px, 5px 5px, 5px 5px;
background-position: -2px -2px, -2px -2px, -1px -1px, -1px -1px;
}

I think it looks better with it.  but yo can just comment it out of that file
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