Steps to reproduce¶

1. Create a folder with some umlaut(special character) in your storage (example "Bärentatze")
2. select the file list module and jump around your files and folders. this works pretty nice
3. select folder "Bärentatze" or a folder underneath
4. switch to some other random module (page, list, ...)
5. select file list module again on the left
6. <peng /> due to some escape/encoding issues the file list will report a failure on first access

Source of problem¶

In typo3/sysext/filelist/Classes/Controller/FileListController.php the following line will become part of the created inline Javascript(!):

if (top.fsMod) top.fsMod.recentIds["file"] = unescape("' . rawurlencode($this->id) . '");

unfortunatly unescape(javascript) will only work on ASCII but not on utf8. It even seems unecessary to decode the string at all, rawurlencode prepares the string in a way that can be consumed for usage as part of an url straight away.