The tip doesn't work for me, the iPad seems to be locked to a centre point on a picture, no amount of scaling or moving will reposition it from this centre. In wallpaper settings I can't even get the zoomed wallpaper to move vertically, it just slides from left to right and snaps back to the same centre point, the same with scaling, I pinch it and the picture resizes then snaps back when I release it.
Even when using the screenshot method the wallpaper does not centre my picture correctly to the landscape orientation, the white vertical bars do not appear on both sides of the wallpaper, it's still offset. The devs have borked a piece of code which worked fine before the update, how something so obvious can get through beta is beyond me.
It's a trivial bug, but annoying all the same.
Yeah, I wish the tip worked, too. For a while, there, I thought it did. But, nope.
The only solution/workaround I have found is to crop or resize a picture to fit the dimensions of the iPad
in the view you want to use it. So, in landscape on an iPad2, use 1024w x 768h (reverse for portrait). On the iPad3 or higher, use 2048w x 1536h for landscape (again, reverse for portrait).
It still does not come out perfectly (darn it!) but it does come close.
And, if you have a picture that is not bigger than these sizes so you can resize it down, you can crop as long as you make it so the shorter side is 1 1/3 smaller ( as in, take the longer side, divide it by 1.33 to get the size).
Annoying? You betcha!
In the hopes that this behavior or setting the wallpaper is a bug, not a feature, may I suggest (ask?) we all bombard Apple's feedback contact about this? Heck, even if it's deliberate on Apple's part, maybe if enough people urge them to "fix" it, they'll listen.
The feedback link is here (just pick iPad as your device):
http://www.apple.com/feedback/
Marilyn