Comment 2 for bug 494082

I've also noticed this in both 10.04 Lucid and 10.10 Maverick.

The root user HAS a trash folder (at /root/.local/share/Trash), with the info and files subfolders.

The problem is.. clicking trash at Nautilus (as root) gives the error "Sorry, could not display all the contents of "trash": Operation not supported" as informed by the OP.

So root user has a trash, the deleted files are there, but Nautilus can not access it. Root can not restore the files or clean the trash the same way a normal user can. Nautilus implementation of trash is broken for the root user.