[TYPO3-english] 4.5 - filename is not sanitized

[Jan Bednarik]

Hi,

when uploading pictures to tt_news, it's not possible to upload pictures 
with diacritics.

I have this file: Příliš žluťoučký kůň úpěl ďábelské ódy.jpg
And when uploaded, error is thrown: 1: 
/DISK2/WWW/example.cz/www/uploads/pics Příliš žluťoučký kůň úpěl 
ďábelské ódy.jpg File extension 'jpg' not allowed. (tt_news:2674:image)

I tried to fiddle with UTF8 filesystem and system locale, but no luck, 
still the same.

Any idea? Upgrading to 6.2 is not an option.

Jan