Using Image Types for Article Image breaks thumbs
If you set up an image type for the article image, both the main image and the thumb and set them accordingly, then you go into the "image" field and change that to use the image type. It breaks the image in all the blocks and the list articles areas. It appears that the blocks or list is looking for the "Large" image which there is no option to create or assign when creating an image type. This causes a 404 on the image.
Using subrion 4.1.5.10 and articles 4.1.1