I think it may have something to do with my theme’s reset file.
`/*RESET*/
/*http://meyerweb.com/eric/tools/css/reset/ | v1.0 | 20080212*/
body, html {height: 100%;}
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, font, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td {margin: 0;padding: 0;border: 0;outline: 0;font-size: 100%;vertical-align: baseline;background: transparent;}
body {line-height: 1;}
ol, ul {list-style: none;}
blockquote, q {quotes: none;}
blockquote:before, blockquote:after, q:before, q:after {content: ”; content: none;}
:focus {outline: 0;}/* remember to define focus styles! */
del {text-decoration: line-through;}
table {border-collapse: collapse; border-spacing: 0;}/* tables still need ‘cellspacing=”0″‘ in the markup */
/*GENERAL STYLES*/
/*FLOATING*/
.left{float: left;}
.right{float: right;}
.clear {clear: both;height: 1px;margin: -1px 0 0;overflow: hidden;}
html body * span.clear,
html body * div.clear,
html body * li.clear,
html body * dd.clear
{background: none;border: 0;clear: both;display: block;float: none;font-size: 0;list-style: none;margin: 0;padding: 0;overflow: hidden;visibility: hidden;width: 0;
height: 0;}`