http://brainstorm.ubuntu.com/item/17390/
The availing solution is manually changing the default login-background (not the normal background) at /etc/gdm/PreSession/Default. If the user does not know where this is or how to edit it, the visual flaw remains.

[37 votes] Solution #1: Automatically assess wallpaper, change default


[89 votes] Solution #2: Fade into the desktop gradually


[42 votes] Solution #3: Preserve GDM wallpaper until Nautilus sets its own


[9 votes] Solution #4: Fade out - Fade in


[13 votes] Solution #5: Background changes to selected (blurred) user's background...


[1 votes] Solution #6: Set the login screen color to black


[5 votes] Solution #7: load the user's wallpaper (optionally)


]]> en-us Sat, 17 Jan 2009 06:51:41 +0000 Sat, 29 Aug 2009 14:28:02 +0000 QAPoll module http://brainstorm.ubuntu.com/idea/17390/ Sat, 17 Jan 2009 11:50:18 +0000 Sat, 17 Jan 2009 14:17:38 +0000 Tue, 27 Jan 2009 16:19:37 +0000
Your Ubuntu has at least 2 users: you and root :)]]> Wed, 28 Jan 2009 01:31:39 +0000 Sat, 29 Aug 2009 14:28:02 +0000