spaces in file names??

I just want to know that If it have space in file's name what happen/what problem?

and one more thing, it have some sitting for sorting it by latest image after I upload, just want to know which that i should correct in coding of slideshow CK.

Pls help

Thanks,

To be clear, this is the native joomla media manager. Nothing to do with my slideshow
The spaces are not allowed because it can cause some problems to retrieve the image path, then for the sorting, I have no idea
You shall better ask this on the forum.joomla.org as it is from the core of joomla! related

Thank,