When Time Machine tries to backup files I've downloaded from the web onto our recentlly purchased GNAP network server, Time Machine issues a warning of ".....file which has an unsupported filename!". The filename is being amended with the additional characters of ":2e_" and/or ".AppleDouble/:2e_" at the front of the filename. As a result, Time Machine won't buckup thoses files. What's happening? If this has any bearing on it, my Connect To Server Address begins with "afp" and my File Sharing has "Share files and folders using FTP" checked. I'm using Snow Leopard v10.6.8 on a Mac Pro.