Fixed genrated filter rules for elements with CSS class

include.postload.js

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2013 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 281 matching lines @@
   if (elt.className)
     elementClasses = elt.className.replace(/\s+/g, ' ').replace(/^\s+|\s+$/g, '').split(' ');
 
   clickHideFilters = new Array();
   selectorList = new Array();
   if (elementId)
   {
     clickHideFilters.push(document.domain + "###" + elementId);
     selectorList.push("#" + elementId);
   }
-  if (elementClasses)
+  if (elementClasses && elementClasses.length > 0)
   {
-    for(var i = 0; i < elementClasses.length; i++)
+    var selector = elementClasses.map(function(elClass)
     {
-      clickHideFilters.push(document.domain + "##." + elementClasses[i]);
-      selectorList.push("." + elementClasses[i]);
-    }
+      return "." + elClass.replace(/([^\w-])/, "\\$1");
+    }).join("");
+
+    clickHideFilters.push(document.domain + "##" + selector);
+    selectorList.push(selector);
   }
   if (url)
   {
     clickHideFilters.push(relativeToAbsoluteUrl(url));
     selectorList.push(elt.localName + '[src="' + url + '"]');
   }
 
   // Show popup
   clickHide_showDialog(e.clientX, e.clientY, clickHideFilters);
 
@@ skipping 264 matching lines @@
 
           clickHide_deactivate();
         }
         break;
       default:
         sendResponse({});
         break;
     }
   });
 }