If I connect windows to windows by TightVNC there is an option to transfer files between computers (in the drop-down list in the top left hand corner of the "window" border). This opens a GUI that looks very like the split screens you get in FTP GUIs, and thus I can transfer files.
If I connect with Linux as either the client or the server or both, the option goes away. In windows the option is grayed out. In Linux it's just not in any of the GUI controls.
How can I effect file transfer over TightVNC when Linux is involved?