The quality of images in the ImageEditor are terrible in my installation, even on jpgs?

 

Clicking on one of the rotate image buttons makes the image quality so bad and ditthered to the point that it is unusable.  I'm using the latest download with the Microsoft sample Waterlillies.jpg image so I don't know what the problem could be?

 

Also hovering the mouse of the icons doesn't give an Alt text description, so it's not until you press a button is it apparent what that icon does.