When updating it with setting the wallpaper, the screen may turn black in the case of OS2.1.You can set it correctly by resetting after setting other live wall papers. It's a feature for OS, and it contains improved OS2.2.
Please see the following deleting method of live wallpaper.
① Settings>Applications>Manage applications> Selection the contents you want to delete>Uninstall
② Android market>My apps>Uninstall
Some content corresponds to the movement to the SD card.
After moving contents to the SD card, it is likely to return todefault both live wallpapers and widgets after restarting.Please note that here we have the use of mobile phones. Please move the contents to SD card when not in use primarily as a wallpaper. When you display as a widget and the main wall paper, please use it thesaved state in the main body.
This is caused by the accumulation of cash in the previous version.It improves it when reinstalling it after it uninstalls it.