Fix the search box on WordPress 3.6 sites using older versions of Roots (non BS 3 versions)

header

<!--Start Search Form -->
<div class="span3">
<div id="search" class="input-append">
<form role="search" method="get" id="searchform" action="http://##SITE-URL-HERE##" _lpchecked="1">
<label class="hide" for="s">Search for:</label> <input type="text" value="" name="s" id="s" class="span2" placeholder="Search...">
<button type="submit" id="searchsubmit" value="Search" class="btn">Search</button></form>
</div>
</div>
<!--End Search Form -->