This is a fun one... My iPhone was jailbroken, but now I am running 3.0 (legally) and decided not to jailbreak for now (I've done it on 3.0 too many times, it is just too buggy to work properly, but that is another discussion). The problem is that I restored my iPhone from a backup and now I cannot change the lock screen wallpaper - I've had this before when Jailbroken because the permissions were set wrong on the file, so deleting LockBackground.jpg fixed the problem, but now I am not jailbroken and obviously can't do that using SSH. Does anyone know of a way to force the iPhone to delete the file or delete it some other way? Diskaid doesn't work with 3.0 and i-funbox needs a jailbroken phone to access those files. Any chance I can extract a backup from 3.0, delete the file and then restore it to my iPhone? iPhone Backup Extractor fails to get the system files from my 3.0 backups so that is no use. Thanks.