Index: class.t3lib_stdgraphic.php
===================================================================
--- class.t3lib_stdgraphic.php	(revision 7106)
+++ class.t3lib_stdgraphic.php	(working copy)
@@ -2725,7 +2725,16 @@
 	 * @return string $inputName escaped as needed
 	 */
 	protected function wrapFileName($inputName) {
-		return escapeshellarg($inputName);
+    if ($TYPO3_CONF_VARS['SYS']['UTF8filesystem']) {
+      $oldLocale = setlocale(LC_CTYPE, 0);
+      setlocale(LC_CTYPE, 'en_US.UTF8', 'en_US.UTF-8', 'en_US', 'American', 'ENG', 'English');
+      $inputName = escapeshellarg($inputName);
+      setlocale(LC_CTYPE, $oldLocale);
+      unset($oldLocale);
+      } else {
+      $inputName = escapeshellarg($inputName);
+    }
+    return $inputName;
 	}
 
 
Index: thumbs.php
===================================================================
--- thumbs.php	(revision 7106)
+++ thumbs.php	(working copy)
@@ -374,7 +374,16 @@
 	 * @return string $inputName escaped as needed
 	 */
 	protected function wrapFileName($inputName) {
-		return escapeshellarg($inputName);
+    if ($TYPO3_CONF_VARS['SYS']['UTF8filesystem']) {
+      $oldLocale = setlocale(LC_CTYPE, 0);
+      setlocale(LC_CTYPE, 'en_US.UTF8', 'en_US.UTF-8', 'en_US', 'American', 'ENG', 'English');
+      $inputName = escapeshellarg($inputName);
+      setlocale(LC_CTYPE, $oldLocale);
+      unset($oldLocale);
+      } else {
+      $inputName = escapeshellarg($inputName);
+    }
+    return $inputName;
 	}
 }