If the background of an element is sipping through when using border radius, use background-clip: padding-box; to tell the browser to extend the background to where the border starts.
• http://stackoverflow.com/questions/2394249/parts-of-background-image-visible-when-using-border-radius • http://tumble.sneak.co.nz/post/928998513/fixing-the-background-bleed
.selector {
background-clip: padding-box;
-moz-background-clip: padding;
-webkit-background-clip: padding;
}