Comments, problem with character encoding

Can you explain in detail?

Where are you seeing this characters?

most often this is due to wrong encoding. Please define it as UTF8

I solved the problem creating conf/bootstrap.before.php file:

<?php if (!defined('APPLICATION')) exit();
   function FetchPageInfo($Url, $Timeout = 0) {
      $PageInfo = array(
         'Url' => $Url,
         'Title' => '',
         'Description' => '',
         'Images' => array(),
         'Exception' => FALSE
      );
      try {
         $PageHtml = ProxyRequest($Url, $Timeout, TRUE);
         $Dom = new DOMDocument();
         @$Dom->loadHTML('<?xml encoding="UTF-8">'.$PageHtml);
         // Page Title
         $TitleNodes = $Dom->getElementsByTagName('title');
         $PageInfo['Title'] = $TitleNodes->length > 0 ? $TitleNodes->item(0)->nodeValue : '';
         // Page Description
         $MetaNodes = $Dom->getElementsByTagName('meta');
         foreach($MetaNodes as $MetaNode) {
            if (strtolower($MetaNode->getAttribute('name')) == 'description')
               $PageInfo['Description'] = $MetaNode->getAttribute('content');
         }
         // Keep looking for page description?
         if ($PageInfo['Description'] == '') {
            $PNodes = $Dom->getElementsByTagName('p');
            foreach($PNodes as $PNode) {
               $PVal = $PNode->nodeValue;
               if (strlen($PVal) > 90) {
                  $PageInfo['Description'] = $PVal;
                  break;
               }
            }
         }
         if (strlen($PageInfo['Description']) > 400)
            $PageInfo['Description'] = SliceString($PageInfo['Description'], 400);
         // Page Images (retrieve first 3 if bigger than 100w x 300h)
         $Images = array();
         $ImageNodes = $Dom->getElementsByTagName('img');
         $i = 0;
         foreach ($ImageNodes as $ImageNode) {
            $Images[] = AbsoluteSource($ImageNode->getAttribute('src'), $Url);
         }
         // Sort by size, biggest one first
         $ImageSort = array();
         // Only look at first 10 images (speed!)
         $i = 0;
         foreach ($Images as $Image) {
            $i++;
            if ($i > 10)
               break;
            list($Width, $Height, $Type, $Attributes) = getimagesize($Image);
            $Diag = (int)floor(sqrt(($Width*$Width) + ($Height*$Height)));
            if (!array_key_exists($Diag, $ImageSort))
               $ImageSort[$Diag] = $Image;
         }
         krsort($ImageSort);
         $PageInfo['Images'] = array_values($ImageSort);
      } catch (Exception $ex) {
         $PageInfo['Exception'] = $ex;
      }
      return $PageInfo;
   }

Thanks to VanillaForum community.