If you're the proud owner of a shiny new Apple iPad then you might have noticed that your iPad 2's Smart Cover hasn't been waking your new iPad from sleep as it should.
The problem lies in the new sleep/wake sensor in the new iPad, which unlike the iPad 2's sensor, is sensitive to the polarity of the Smart Cover magnet – a problem explained in detail over at markshangout.
Ultimately, this means that some Smart Covers will have the magnet facing the wrong way and wont work with the new iPad, whereas some will work just fine.
The Verge reported US Apple stores are offering free replacement Smart Covers for defective ones. Apple Australian representatives did not respond to request for information by the time of publication.
If you're feeling particularly feisty then you can always make a little incision in your Smart Cover and flip the magnet round yourself.