Strangely, the orientation lock only seems to be able to lock the screen into portrait mode. You can’t lock a screen into landscape mode—in fact, if you try to invoke the orientation lock while you’re already in landscape mode, the OS will switch back to portrait to lock.
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Source: Ars reviews iOS 4: what’s new, notable, and what needs work I suspect this is because not all apps, including the home screen, support landscape mode. |
