Bug 660653: increased the width of back/next divs to minimize layout problems

media/css/base-mobile.css

@@ -21,10 +21,17 @@ html, body {
 }
 
 .page-nav div.left, .page-nav div.middle, .page-nav div.right {
-    width:33.33%;
     float:left;
 }
 
+.page-nav div.left, .page-nav div.right {
+    width:42.5%;
+}
+
+.page-nav div.middle {
+    width:15%;
+}
+
 .page-nav div.middle {
     margin-top:3px;
 }