Remove special characters in uploaded file URL Fckeditor

Add the following line in the /filemanager/browser/default/connectors/php/commands.php file in order to replace all characters unreadable in an URL by an underscore (_)

In function FileUpload around line 143 after

// Get the uploaded file name.
$sFileName = $oFile['name'] ;
$sOriginalFileName = $sFileName ;

#### LINE TO ADD ####

$sFileName = eregi_replace("[^a-z0-9.]", "_", $sFileName);

Could be a lot improved because it only keep the numerical and alphabetical characters and the point (for file extension) but it was enough for my need ;-)
Cheers Shami