If you're using GNOME, run this command:
you might not see anything, or, if you're like me, you'll see about 2 000 files. you'll probably want to delete them or simply "empty" the trash.
gksudo nautilus '/root/.Trash/'
i suppose that anything you delete while running nautilus as root goes there. like an idiot, i had assumed that such things would just go in '~/.Trash'
i've been using ubuntu for about a year now, and just realised this. it may seem like common sense, but if it could happen to me, it could happen to you.
If you're using Xfce, run this:
Then click on "Trash."