Dust Circles?

So...we're putting in a sliding glass door in the dining room. The door is in, the drywall work is done. Now we're just finishing the molding around the door....and CLEANING UP THE MESS.

This morning, I cleaned the cat fountain thing (yes, they are running water addicts), and cleaned the corner where it sits. But that's all the further I got before I had to head to work.

Mot sent me this picture once I arrived at work.



Apparently aliens visited our dining room after I left.