Sorry for my English.
I have 30 workstations connected with a windows server 2003 (with active directory).
I set the lock workstations with GPO but without any screensaver (screensaver name "none"). Workstation get locked out correctly after 10 minutes, but without any screensaver interference.
The problem is that some workstations, after lock, maintain the desktop theme (wallpaper) and some have blue background. Why?
I think that all workstations have the same settings.