<p>Firefox 30 seems to have broken the styling of the search box - the "Go" button has grown by two pixels vertically so that it no longer matches the input field and also causes a white line to appear at the bottom.</p>
<p>We appear to be relying on <code>line-spacing: 20px</code> on input buttons to set the height, but in FF30 the height is actual coming out as 22px. Reducing vertical padding from 5 to 4 fixes it for FF30 but would presumably break other browsers.</p>
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