(not sure if bug is in mcs-manager or desktop, guessing)

If I store a value that's not valid XML - for example, a filename with an
ampersand - it's not xml-quoted. When I next login, that setting is lost.

Reproducible: Always
Steps to Reproduce:
1. create an image with an ampersand in the filename. For example
"~/images/eris&chao.jpg".
2. set it as your desktop background.
3. log out.
4. log in again.

Actual Results:  
a. background was reset to the defaults.

b. if between steps 3 and 4 I look at .config/xfce4/mcs_settings/desktop.xml I see
    <option name="imagepath_0_0" type="string"
value="/home/lalo/images/eris&chao.jpg"/> (bad xml)

Expected Results:  
a. background remains what I set.

b. if between steps 3 and 4 I look at .config/xfce4/mcs_settings/desktop.xml I see
    <option name="imagepath_0_0" type="string"
value="/home/lalo/images/eris&amp;chao.jpg"/> (valid xml)

If I actually edit desktop.xml by hand and put the &amp; there, it works, well,
at least until I open the desktop settings applet again :-)

% dpkg -s xfce4-mcs-manager | grep Version
Version: 4.1.99.2+cvs.20041203-1
% dpkg -s xfdesktop4 | grep Version
Version: 4.3.5+cvs.20041203-3