I got this annoying problem that i probably coursed myself, but i can't get it fixed. When booting and getting to the login screen, i got an old wallpaper i set ages ago, not my current wallpaper. So i installed ubuntu-tweak to try fixing it, but it only has an option to use some specific background. After setting that, it get a flash of the one set by ubuntu-tweak and then followed by the old one that wouldn't change, not my current.
I tried gconf, and cleared the line under unity-greeter that sets the background. Purged ubuntutweak. Tried !gsettings reset com.canonical.unity-greeter draw-user-backgrounds" and some others. looked for unity-greeter in lightdm floder, not there.
Just wan't something to be reset to default..
Ubuntu destop 13.04 (64).