Index: class.tslib_fe.php
===================================================================
--- class.tslib_fe.php	(revision 2308)
+++ class.tslib_fe.php	(working copy)
@@ -1558,20 +1558,38 @@
 	 * @see reqCHash()
 	 */
 	function makeCacheHash()	{
+		/* Declare */
 		$GET = t3lib_div::_GET();
-		if ($this->cHash && is_array($GET))	{
-			$this->cHash_array = t3lib_div::cHashParams(t3lib_div::implodeArrayForUrl('',$GET));
-			$cHash_calc = t3lib_div::shortMD5(serialize($this->cHash_array));
+		$cHashNeeded = false;
+		$this->cHash_array = t3lib_div::cHashParams(t3lib_div::implodeArrayForUrl('',$GET));
+		$cHash_calc = t3lib_div::shortMD5(serialize($cHash_array)); // Calculating the correct cHash
 
-			if ($cHash_calc!=$this->cHash)	{
-				if ($this->TYPO3_CONF_VARS['FE']['pageNotFoundOnCHashError']) {
-					$this->pageNotFoundAndExit('Request parameters could not be validated (&cHash comparison failed)');
-				} else {
-					$this->set_no_cache();
-					$GLOBALS['TT']->setTSlogMessage('The incoming cHash "'.$this->cHash.'" and calculated cHash "'.$cHash_calc.'" did not match, so caching was disabled. The fieldlist used was "'.implode(',',array_keys($this->cHash_array)).'"',2);
-				}
+		/* Begin */
+		if ((count($this->cHash_array) == 1) && isset($this->cHash_array['encryptionKey'])) {
+			//We have only 1 key, and it's 'encryptionKey', also all GET parameters are TYPO3 reserved variables -> no cHash needed
+			$cHashNeeded = false;
+			//Reset cHash_array
+			$this->cHash_array = array();
+		} elseif ((count($this->cHash_array) == 2) && isset($this->cHash_array['']) && isset($this->cHash_array['encryptionKey'])) {
+			//If we have only 2 keys, and theses two keys are '' and 'encryptionKey', then whe are sure that we have NO _GET parameters
+			$cHashNeeded = false;
+			//Reset cHash_array
+			$this->cHash_array = array();
+		} else {
+			//Here we need a correct cHash
+			$cHashNeeded = true;
+		}
+
+		//*** Checks cHash needed against cHash found, and compare it (a missing cHash or a useless cHash is WRONG)
+		if (($cHashNeeded XOR $this->cHash) || strcmp($cHash_calc, $this->cHash)) {
+			if ($this->TYPO3_CONF_VARS['FE']['pageNotFoundOnCHashError']) {
+				$this->pageNotFoundAndExit('Request parameters could not be validated (&cHash comparison failed)');
+			} else {
+				$this->set_no_cache();
+				$GLOBALS['TT']->setTSlogMessage('The incoming cHash "'.$this->cHash.'" and calculated cHash "'.$cHash_calc.'" did not match, so caching was disabled. The fieldlist used was "'.implode(',',array_keys($this->cHash_array)).'"',2);
 			}
 		}
+
 	}
 
 	/**