Hi Guys,
I too had the same problem with the wallpaper changing automatically.
Drove me crazy! Not to mention drained my battery quickly.
From what i can recall, the last couple of setting changes i had made were:-
1) Enabled Live wallpapers.
2) Enabled All animations.
This is what i did to fix the problem.
Go to Settings -> Display -> Animation
Set this to "No Animation" and apply.
Exit back to home page and confirm the above settings are still set to
no animation.
Next, restart your phone.
Once restarted, from home screen click on the bottom left button, then select "Wallpaper". Now choose a wallpaper that is
NOT a
live wallpaper.
Once my new wallpaper has been set, i went back into display settings, and enabled "some animations".
Been working fine all day now.
Yay!!!
Hope it works for you too.