FIX FOR LOCK WALLPAPER NOT CHANGABLE ANYMORE AFTER USING THEMES
Let me (iAddict) put this up straight in hope to clear the confusions.
[PROBLEM]
You cannot change your wallpaper using the iPhone's Original Settings Menu after trying to set the lock wallpaper (or applying themes) using Customize, Winterboard or other themes
[CAUSE]
Customize or theme applications probably messed up your lock screen wallpaper because it doesn't apply the correct file permissions. Therefore, the wallpaper file cannot be overwritten by the system when you try to change it in the settings menu.
[SOLUTION]
- Open SSH and connect to your device (Read the guides if you don't know how)
- Go to this directory and delete /var/mobile/Library/LockBackground.jpg on your phone.
- Go to iPhone's Settings>Wallpaper and select any new wallpaper
- Try and see if the new wallpaper is in place!
Good Luck & use click Thank you button if you find this helpful! Credits to numerous forum members as well 