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I didn't notice this, and the amazon page made no mention of it however the YN560-TX has two different models so buyer beware.
Sent the amazon store a message to see if they're willing to do anything about it - it still works...for one shot, and then it will refuse to activate the flash anymore unless you restart the commander which is admittedly easy and quick to do but it's pretty annoying.
Just thought I'd throw out a heads up.