I can confirm that the icons' position is not remembered after reboot(restart) on a laptop with Xubuntu 14.04 with xfdesktop4 4.11.8-0ubuntu0.1 i386, although it is remembered after logout&login.
I can confirm that the icons' position is not remembered after reboot(restart) on a laptop with Xubuntu 14.04 with xfdesktop4 4.11.8-0ubuntu0.1 i386, although it is remembered after logout&login.