diff -ru typo3_src.orig/t3lib/class.t3lib_lock.php typo3_src.new/t3lib/class.t3lib_lock.php
--- typo3_src.orig/t3lib/class.t3lib_lock.php	2010-09-01 19:48:42.000000000 +0200
+++ typo3_src.new/t3lib/class.t3lib_lock.php	2010-09-09 15:50:32.000000000 +0200
@@ -149,26 +149,25 @@
 
 		switch ($this->method) {
 			case 'simple':
-				if (is_file($this->resource)) {
+				if (is_file($this->resource))
 					$this->sysLog('Waiting for a different process to release the lock');
-					$i = 0;
-					while ($i<$this->loops) {
-						$i++;
-						usleep($this->step * 1000);
-						clearstatcache();
-						if (!is_file($this->resource)) {	// Lock became free, leave the loop
-							$this->sysLog('Different process released the lock');
-							$noWait = FALSE;
-							break;
-						}
+
+				$isAcquired = false;
+				$noWait = True;
+				for ($i = 0; $i < $this->loops; $i++) {
+					$f = @fopen($this->resource, 'x');
+					if ($f !== FALSE) {
+						fclose($f);
+						$this->sysLog('Lock aquired');
+						$noWait = ($i == 0);
+						$isAcquired = true;
+						break;
 					}
-				} else {
-					$noWait = TRUE;
+					usleep($this->step * 1000);
 				}
 
-				if (($this->filepointer = touch($this->resource)) == FALSE) {
+				if (!$isAcquired)
 					throw new Exception('Lock file could not be created');
-				}
 			break;
 			case 'flock':
 				if (($this->filepointer = fopen($this->resource, 'w+')) == FALSE) {
@@ -293,4 +292,4 @@
 if (defined('TYPO3_MODE') && $TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_lock.php'])	{
 	include_once($TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_lock.php']);
 }
-?>
\ No newline at end of file
+?>