[ubuntu] To background in login screen.

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http://ubuntuforums.org – Ubuntu destop 13.04 (64). Hi. 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 opened gconf, and cleared the line under unity-greeter that sets the background. Purged ubuntutweak. Tried !gsettings (Hardware)