[Trisquel-users] How to have a good looking Synaptic with triskel?

[mtlben]

Hi -

KDE is now my preferred desktop.  GTK programs are properly themed in  
general, but I have a problem with synaptic which I still use for fine-tuned  
package management.  If I launch it with a regular user, it looks good (but  
this is useless of course).  If I launch it as root, it's not properly themed  
and looks ugly.

$ synaptic -> looks good
$ sudo synaptic -> looks ugly

What can I do to so that the right theme (I believe it is oxygen) is used by  
applications launched with root privileges?