CSS Color Doesn't Load for Button

Can somebody assist with why the buttons on the page below don't render the background color correctly? The background-color property appears to be set correctly but I'm wondering if there开发者_开发问答's a conflict with another CSS file my template is using. Any advice?

http://www.chrisboulasphotography.com/store/ferrari-owners-manuals

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This gradient (defined in /wp-content/w3tc/min/1088176c.f6146a.css on line 379) is clobbering the background property...

background-image: -moz-linear-gradient(center bottom , #F0F0F0 2%, #FAFAFA 51%);

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Alex answered this perfectly right. Using Firefox with Firebug I have been able to disactivate the css line he suggested and it seems that the background color of your buttons appears again.

Have you emptied you cache to check if it's not your browser who has kept the old css in memory?