Index: t3lib/class.t3lib_tcemain.php
===================================================================
--- t3lib/class.t3lib_tcemain.php	(revision 46985)
+++ t3lib/class.t3lib_tcemain.php	(working copy)
@@ -6750,6 +6750,11 @@
 	 * @return	void
 	 */
 	public function clear_cacheCmd($cacheCmd) {
+			// Check if there's anything to do
+		if (empty($cacheCmd)) {
+			return;
+		}
+
 		if (is_object($this->BE_USER)) {
 			$this->BE_USER->writelog(3, 1, 0, 0, 'User %s has cleared the cache (cacheCmd=%s)', array($this->BE_USER->user['username'], $cacheCmd));
 		}