Support Wallpaper zooming in.

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http://androidforums.com – Ok this is annoying me a lot more than it should but how come my wallpaper (720x1280) zooms in on my home screen but not on the lock screen? On the lock screen it is the perfect size and the entire wallpaper is visible but then on the home screen the same wallpaper is zoomed in, why? And can I stop this? (General)