Alongside Fedora I have Salix installed and there deleting files from ntfs works without tweaks (however in some different manner as files are moved to ~/.local/share/Trash/files). Salix people claim they didn`t tweak anything to achieve it and it should work like that. Maybe there is a bug in Fedora or XFCE4.8?
Anyway, I`ll try to play with ntfs permissions.
[EDIT] Indeed, when I mounted with 'permissions' and gave the full access (0777) to the mountpoint, the trash started to work.
Thanks a lot, Jean Pierre .