Ubuntu 11.10, with lightdm 1.0.6 with nvidia 173.14.30 drivers.
User A logs in. User B then users the Switch User Account indicator, locking user A's session. After completing their task, user B, leaves the computer, and the screen saver starts, locking the session. User A returns to the computer, and switches to their session. After unlocking their session, the desktop background is corrupted, and displays User B's background wallpaper and files and folders on user B's desktop. User A cannot interact with User B files and folders, and can clearly read the file and folder names!
Ubuntu 11.10, with lightdm 1.0.6 with nvidia 173.14.30 drivers.
User A logs in. User B then users the Switch User Account indicator, locking user A's session. After completing their task, user B, leaves the computer, and the screen saver starts, locking the session. User A returns to the computer, and switches to their session. After unlocking their session, the desktop background is corrupted, and displays User B's background wallpaper and files and folders on user B's desktop. User A cannot interact with User B files and folders, and can clearly read the file and folder names!