ubuntu tweak won't disable fix root appearance

When i try to disable the fix appearance of programs granted administrative privileges thing, the check box clears, but when I open Tweak again, it's back to checked. I know that something is wrong, because the terminal spits this out

ryan@ryan-laptop:~$ ubuntu-tweak
/home/ryan/.gtkrc-2.0:8: Unable to find include file: ".themes/nautilus/nautilus.rc"
ERROR:dbus.proxies:Introspect error on :1.63:/com/ubuntu_tweak/daemon: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.AccessDenied: Rejected send message, 1 matched rules; type="method_call", sender=":1.62" (uid=1000 pid=3833 comm="/usr/bin/python) interface="org.freedesktop.DBus.Introspectable" member="Introspect" error name="(unset)" requested_reply=0 destination=":1.63" (uid=0 pid=3835 comm="/usr/bin/python))
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/lockdown.py", line 88, in on_fix_theme_btn_taggled
    proxy.unlink_file(ROOT_THEMES)
  File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 140, in __call__
    **keywords)
  File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 620, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Python.OSError: Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/dbus/service.py", line 702, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/backends/daemon.py", line 314, in unlink_file
    os.unlink(path)
OSError: [Errno 21] Is a directory: '/root/.themes'