TYPO3 Core

It seems that the "Select & upload files" function is not working for inline records => the TYPO3 element browser is not shown after clicking the link/button. If I create the record directly (not as an inline record) the file upload works perfectly. Here's the field configuration I'm using:

'image' => array(
    'config' => \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::getFileFieldTCAConfig('image', array(
        'maxitems' => 1,
        'foreign_types' => array(
            \TYPO3\CMS\Core\Resource\File::FILETYPE_IMAGE => array(
                'showitem' => '
                    --palette--;;filePalette
                ',
            ),
        ),
    ), $GLOBALS['TYPO3_CONF_VARS']['GFX']['imagefile_ext']),
),

Best regards
emphis