Wallpaper image stay on the screen after I choose the kernel to start.

[Luca Della Ghezza]

Hi to all.
I'm using Ubuntu 12.04 (AMD64) with Grub2. I customized the grub 
appearence using the Grub Customizer software (by Daniel Richter) and 
everything is ok, but I found that using a jpg image as wallpaper, that 
image stay on the screen after the kernel has been choose (manually or 
automatically) and this kills the splash image.
As Daniel says in this Launchpad answer 
https://answers.launchpad.net/grub-customizer/+question/220803 , his 
software uses the standard way to set the wallpaper image.
So my question is:
There is something we can do to make disappear the wallpaper image once 
the kernel has been selected to start?
Or is a "bug" that must be corrected in the grub2 code?
Thx a lot.

Luca.