Hi,
I think possibly this behaviour can be changed in gconf-editor.
I don't think it can, actually, I think Nautilus just confirms for full delete or empty trash, and I think that flavour of trash confirmation is enabled by default in recent Ubuntu Gnome.
Simon - if you really want this functionality in Nautilus, one option might be to install trash-cli, write a script along the lines of
#!/bin/bash if zenity --question --title Send to trash? --text "Are you sure you want to send the following items to the trash can? $*"; then trash -- $*; fi
make it executable, and then try and bind the delete key to run that script - this last bit's the most likely to be problematic. I try to avoid using Nautilus where I can, and gregedit^gconf-editor doubly so, so I shan't advise how to do that in an OTOH email.
As I say, I'd investigate the keybindings bit, first.
Regards,
Marcus Harris.