Why FtpLabyMaker is so special ? Oh just because it knows some special tricks to create locked files or directories on IIS servers or some Unix servers. A locked file is a file with a non-allowed filename containing, by example, special Windows devices like com1, prn, lpt4 etc. Another trick is to add spaces at the begining or the end of the filename. Classical ftp-clients can't deal with these locked files. But it's not finished because FLM is designed to browse labyrinths made of locked-directories and during that browsing it can clean the site (deleting files, directories) or even locking it. It's not finished because FLM can also create large and deep locked and tagged labyrinths to make your friends or worse ennemy crazy !