Quote:

For image elements, make sure that you use valid images. Valid images have an src attribute or a dynsrc attribute, or both, specified. Also, the value of the src attribute is set to a valid image or the value of the dynsrc attribute is set to a valid video file, or both.

For anchor elements, use the HTTP URL type or the HTTPS URL type.

In my case, things broke after the patch because I was using javascript: hrefs in some drag-links. Solution was to move these to an onclick="" parameter and add a regular href.