Fix in the class AkCacheHandler

function _buildCacheId($path, $forcedLanguage = null, $normalize = true)
{
if ($path === null) {
$path = @$_REQUEST['ak'];

// Fix : Pb with cached homepage
if ($path==''){
include_once (AK_LIB_DIR.DS.'AkRouter.php');
$Map = new AkRouter();
if(is_file(AK_ROUTES_MAPPING_FILE)){
include_once(AK_ROUTES_MAPPING_FILE);
}

$path = $Map->toParams('/');
$path = implode('/',$path);
}

} else if (is_array($path)) {
unset($path['lang']);
$path = $this->_pathFor($path, $normalize);
} else if (is_string($path)) {
;
}

$path = ltrim($path,'/');
if (preg_match('@^([a-z]{2,2}|[a-z]{2,2}_[a-z]{2,2})/.*$@', $path)) {
$parts = split('/',$path);
$forcedLanguage = array_shift($parts);
$path = implode('/',$parts);
}
$cacheId = preg_replace('|'.DS.'+|','/',$path);
$cacheId = rtrim($cacheId,'/');
$parts = split('/',$cacheId);

$hasExtension = preg_match('/.+\..{2,4}/',$parts[count($parts)-1]);
if (!$hasExtension) {
if (isset($this->_controller)) {
$cacheId.= '.'.$this->_controller->Request->getFormat();
} else {
list($format, $requestPath) = AkRequestMimeType::getFormat($path);
$cacheId.= '.'.$format;
}
}

$getParameters = $_GET;

unset($getParameters['ak']);
if (is_array($this->_include_get_parameters) && !empty($this->_include_get_parameters) && !empty($getParameters)) {
$cacheableGetParameters = array();
sort($this->_include_get_parameters);
foreach ($this->_include_get_parameters as $include_get) {
if (isset($getParameters[$include_get])) {
$cacheableGetParameters[] = $include_get .DS.$getParameters[$include_get];
}
}
/**
* writing cache fragment for the get_params that should be cached
*/
$this->writeFragment('get_params'.DS.$cacheId,serialize($this->_include_get_parameters));
$cacheIdGetPart = implode(DS,$cacheableGetParameters);
$cacheId .= DS . $cacheIdGetPart;
} else if (!$this->_controller) {
/**
* reading cacheable get_parameters and adding them to the cacheId
*/
if(($useCacheGetParams = $this->readFragment('get_params'.DS.$cacheId))) {
$useCacheGetParams = unserialize($useCacheGetParams);
$cacheableGetParameters = array();
foreach($useCacheGetParams as $p) {
if(isset($getParameters[$p])) {
$cacheableGetParameters[]=$p.DS.$getParameters[$p];
}
}
if (!empty($cacheableGetParameters)) {
$cacheIdGetPart = implode(DS,$cacheableGetParameters);
$cacheId .= DS . $cacheIdGetPart;
}
}
}
$cacheId=strlen($cacheId)>$this->_max_url_length?md5($cacheId):$cacheId;
$cacheId = ($forcedLanguage!=null?$forcedLanguage:$this->_getDefaultLanguageForUser()).DS. $cacheId;
$this->_lastCacheId = preg_replace('|'.DS.'+|','/',$cacheId);
return $this->_lastCacheId;
}