I have the same bug on Xubuntu 15.04, however I have registered the bug I on a previous version Xubuntu 14.10 too. All updates are done.
A workaround for my desktop is the next command: cp rc.backup ~/.config/xfce4/desktop/icons.screen0-1350x752.rc && xfdesktop --reload
It seems the bug is not never fixed correctly .
I have the same bug on Xubuntu 15.04, however I have registered the bug I on a previous version Xubuntu 14.10 too. All updates are done.
A workaround for my desktop is the next command: xfce4/desktop/ icons.screen0- 1350x752. rc && xfdesktop --reload
cp rc.backup ~/.config/
It seems the bug is not never fixed correctly .