Clean out floated stuff, so the footer won't get overlayed on the sidebar

include/layout.inc

@@ -181,6 +181,7 @@ function site_footer()
     print <<<END_FOOTER
 
  </div>
+ <div class="cleaner">&nbsp;</div>
 {$layout_helper}</div>
 
 <div id="footnav">

sitewide.css

@@ -126,6 +126,12 @@ ul.simple li {
 	/* Background to the right */
 }
 
+.cleaner {
+	clear: both;
+	height: 1px;
+	font-size: 1px;
+}
+
 #leftbar {
 	float: left;
 	width: 186px;