Space in folder names

Hi All's,

Is this a bug ? or a configuration issue ?

I've got space in folder name where photos are located ...
If I set:
20100101 Yuna => I can't see photos
20100101_Yuna => I can see photos

Any solution ?

Here is the php conf:
root@host>grep ^mbstring /etc/php.ini
mbstring.language = Neutral
mbstring.internal_encoding = UTF-8
mbstring.http_input = auto
mbstring.encoding_translation = On
mbstring.detect_order = auto
mbstring.strict_encoding = On