1.3.9 Update Error: - 1.3.9 Update Error: 6917

Update Error from 1.3.8 to 1.3.9 via Joomla Backend. Extension Update works fine. Component Update dont work!

First Error Messages:

        * JFolder::files: Path is not a folder
        * JFolder::folder: Path is not a folder
        * JFolder::files: Path is not a folder
        * ERRORNOTFINDJOOMLAXMLSETUPFILE
        * Fehler: Upgrade nicht verfügbar

Second Error Messages:

Warning: array_merge() [function.array-merge]: Argument #1 is not an array in xxxxxxxxxxxxx/libraries/joomla/installer/helper.php on line 142

Warning: array_merge() [function.array-merge]: Argument #2 is not an array in xxxxxxxxxxxxx//libraries/joomla/installer/helper.php on line 142

Warning: Invalid argument supplied for foreach() in xxxxxxxxxxxxx//libraries/joomla/installer/helper.php on line 187

Any idea?

Greetings...