Help Square half box on Unlock screen

[bugpack6]

I have a brand new Nexus 7. 2013. When I hit the power button and the lock screen comes up, I am getting a half box white line on the upper left hand corner. Its about a 1.5x1.5in half box that is cut in half with the upper left hand part of the screen. It's as if there should be a widget there but its an outlined white box that's cut in half. Strange. Hope I described this good enough. It flashes then goes away before I unlock the screen.
Any ideas what this might be? Do I have a defective unit.

 

[bugpack6]

Just noticed this. When holding it in landscape, or sideways the white lines show as a box around the clock. Now this I understand, but why would this shoe up when holding it in portrait mode as a half box in the upper left hand corner?????

 

[Little Darwin]

I have seen the same thing. It has been a guess of mine that it is reminding me that I can slide over to see the clock. I don't think it is a defect.

 

[Hoosiermama]

It's like a "reminder" that you can add more widgets to the lock screen. Not the most attractive, but that's what it is.

 

[almosteuro]

Glad to see that I'm not the only one with this issue. Its quite annoying. I DO NOT need a reminder to let me know that I can add more widgets to my lock screen. I have been trying to figure out how to remove this but no luck yet. Hopefully someone will come up with an answer.