Nautilus crashes when changing permissions

This happens when running as root:

myuser@mycomputer:~$ gksu nautilus

When permissions are changed through right-clicking a folder and selecting properties, nautilus displays a properties dialog, quickly followed by an empty dialog box and crashes. This only affects folders, not files.

Sometimes the dialog displays:

"The owner could not be changed."
"Sorry, could not change the owner of 'test'. Specified owner 'myuser' does not exist."

(See attachments).

I know myuser exists as I am logged in as myuser!
This also happens when the folder is owned by 'otheruser', who is not logged on.

===Work-around===

Use chmod to change permissions.

-------------------------------------------------------
1) Description: Ubuntu 13.04
Release: 13.04
-------------------------------------------------------
2) nautilus:
  Installed: 1:3.6.3-0ubuntu16
  Candidate: 1:3.6.3-0ubuntu16
  Version table:
 *** 1:3.6.3-0ubuntu16 0
        500 http://ve.archive.ubuntu.com/ubuntu/ raring/main amd64 Packages
        100 /var/lib/dpkg/status
------------------------------------------------------
3) I expected for it to let me change basic folder properties and/or permissions.
------------------------------------------------------
4) Instead it crashes.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: nautilus 1:3.6.3-0ubuntu16
ProcVersionSignature: Ubuntu 3.8.0-30.44-generic 3.8.13.6
Uname: Linux 3.8.0-30-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
Date: Sat Sep 14 19:23:22 2013
GsettingsChanges: b'org.gnome.nautilus.window-state' b'geometry' b"'800x550+65+189'"
InstallationDate: Installed on 2013-08-04 (41 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)