Thanks for creating and maintaining this resource.
I recently ended up with some files in root Trash that stubbornly would not be removed. They were placed there due to a stupid noob trick I managed using Clonezilla wherein I used root as a target for a backup (yeah, seemed like a good idea at the time ) This wasn't much more than annoying until I decided to move the system to a (small) SSD. Now that 20+GB was a big deal.
I followed all the instructions here but the root Trash just would not delete.
I finally found a link that suggested a tweak to the command line for nautilus:
This allowed me to delete the offending files in Trash, never to be seen again.
gksudo dbus-launch nautilus
I'd give attribution to where I found this tidbit, but I lost the URL in the flurry of searches and curses I was spewing at the time...
I don't pretend to truly understand why this worked in my circumstance, but maybe it would be helpful to others who've exhausted the other options.