I upgraded to the latest version yesterday morning and since then when I assign a material to an ID from the layer checkbox it, every other time, crashes. Some layers or folders are ok to assign to id, and never crash, and other ones systematically crash. It wasn't doing that the few days prior before I upgraded, but then…
Oh yes, I forgot to mention it doesn't crash when assigning a new material to an ID from the 3DO viewer. When creating a material, that's usually when I assign material to an ID, from 3DO, but sometimes I change my mind after and want to switch a material to another ID, that's when I do it from the layer/folder checkbox…
That's indeed a strange issue! Have you tried assigning materials to color IDs from 3DO instead? Inside of 3DO, press and hold C, and then pick the color you'd like to mask with. Let me know if that crashes.
Woah, weirdly enough, I was just opening a new project with the same mesh and same ID map, and when I first tried to apply a material on an ID from the 3DO viewer, it just gave another "The suite has crashed" error message (forgot to screencap it). Then it froze the 3DO viewer and crashed Photoshop. That's new from before…