Please describe the problem:
When I change the default text editor in gnome-default-applications-properties,
my choice is not remembered, and the default text editor is not changed.

Steps to reproduce:
1. Open gnome-default-applications-properties (Applications->Desktop
Preferences->Advanced->Preferred Applications)
2. Select the 'Text Editor'-tab and choose another text editor (whether you use
the drop-down list or the Custom... button makes no difference)
3. Close the window
4. Open it up again, select the 'Text Editor'-tab and see that it hasn't saved
the change


Actual results:
When I change the default text editor, close the window, and come back, the old
text editor is selected again. When I run the application in a terminal, and try
to change the text editor, this warning is shown:

(gnome-default-applications-properties:18482): libgnomevfs-WARNING **:
Deprecated function.  User modifications to the MIME database are no longer
supported.


Expected results:
I'd expect the default text editor to be changed, obviously ;)

Does this happen every time?
Yes.

Other information: