TYPO3 Core

If one configures a field in the TCA with type=group, internal_type=file and minitems=1, the upload field displayed in the BE form does not work. You can select an upload from the element browser, but not direclty upload a new file.

Example TCA to reproduce:
'image' => array(
'exclude' => 1,
'label' => 'Image',
'config' => array(
'type' => 'group',
'internal_type' => 'file',
'allowed' => $GLOBALS['TYPO3_CONF_VARS']['GFX']['imagefile_ext'],
'max_size' => $GLOBALS['TYPO3_CONF_VARS']['BE']['maxFileSize'],
'uploadfolder' => 'uploads/tx_extkey',
'show_thumbs' => 1,
'size' => 1,
'minitems' => 1,
'maxitems' => 1,
)
),