On the Xfce 12.10 desktop drag&drop to move files into a folder would copy them instead of moving (cut/paste) them.
I tend to have many files on the desktop and usually I grab them and put them in a folder for further use etc. I want to be able to do this by drag&drop, but at the present drag&drop makes a duplicate of them in that folder without removing them from their previous location.
In Xfce I use the default Thunar, and it handles the desktop.
The question is limited to an older version of Thunar. In thunar 1.6.3, Xubuntu 14.04. drag&drop moves by default instead of just copy.