Delete uploaded wallpaper

[habile]

Hi,

I was attempting to change the wallpaper on the T48G by providing a random (correctly sized) JPG as the wallpaper_upload.url and switching to it using phone_setting.backgrounds = Config:random.jpg

The problem I have is that although I'm updating the JPG on the tftpserver the phone is not replacing the existing JPG even though it is downloaded from the tftp server.

How can I delete the existing wallpaper through provisioning? I could find only how to delete logos and ringtones but not wallpaper.

I could give the random image a unique name but with no way to delete them they will just pile up.

Thanks
Chris