An update has been pushed to Raspbian to flip the screen ( rotate it by 180 degrees ) for a better desktop viewing angle. This makes it upside-down in most stands/frames/cases, so you'll need to change a setting to flip it back.
To do this, open /boot/config.txt in your favourite editor and add the line:
This will rotate both the LCD and the touch coordinates back to the right rotation.
Don't use the documented display_rotate, it performs a performance expensive rotation of the screen and does not rotate the touch input.