Jailbroken Greenpoison 4.2.1. This is my second jailbroken i4, and I'm stumped. Let me start by saying that I am aware that some themes have stock background images that you cannot change. However, I have several, that you can add whatever backgroung you want from your library. Even though I have selected user wallpaper in Winterboard, the background still remains black as does the lockscreen. My first i4 did not do this. Any ideas?