Steps to reproduce:
1) Create a new project.
2) Select 'Main Camera' in the Hierarchy.
3) Double click the 'Background' color box in the Inspector.
4) Click on the Eyedropper tool.

The box that should show the area where the mouse cursor is, instead shows area that is offset from the mouse cursor, the offset depends on the placement of the Color window on the screen (moving the Color window changes the offset). Also, the view is flipped upside down.