Imported Images are flipped

Images are now importing flipped horizontally. Huh? I see them as expected in the File Browser window, but when imported, it's flipped.

I did change one intentionally a while back using the properties Y-Rotation. But I've checked that setting. Now every image is flipped. I don't see anything in the Project Settings, or Preferences, HUD... What have I done? Where can I look to see why it's happening? TIA