TYPO3 Core

I can confirm this problem.

I traced this problem down to an API problem inside the API.

TYPO3\CMS\Core\Resource\AbstractFile->name: Name of this file.
TYPO3\CMS\Core\Resource\File->__construct($fileData) $fileData: Array of the sys_file DB entry.
$fileData['name']: Value of the table field "name" in "sys_file" table.

But this field is the title field.

TYPO3\CMS\Core\Resource\AbstractFile->getExtension() does a pathinfo to the property "name" to get the extension, which already lies in the property "properties" of AbstractFile. And why lowercase it?

TYPO3\CMS\Core\Resource\Driver\LocalDriver->extractFileInformation() This function again uses the fileName of the file for the "name" property of the AbstractFile and not the one from the Storage. TYPO3\CMS\Core\Resource\Filter\FileExtensionFilter->filterFileList() asks the Driver and not the Storage?

I didn't read any FAL design, as there is nothing in the wiki, but this looks a bit like a problem inside the API.

This should be fixed with the patch for #39884 and #36795.

Patch set 2 for branch master has been pushed to the review server.
It is available at http://review.typo3.org/14260

Patch set 3 for branch master has been pushed to the review server.
It is available at http://review.typo3.org/14260