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I'm not sure if this is a bug or not, but since debug is so hard to get from users, I'll record this just in case:
It seems this is an attempt to cancel this order: http://blockscan.com/txInfo/12163213
I checked Pending transactions and there's nothing from
1GsJaWxN9LojzDGFXFticEkfxFuUxds7s3
right now, so I don't know what to make of it.Text from the screenshot above: