Comment 6 for bug 1460319

Apologies, I did have a look to see if I could see an existing bug, but I was being blinkered and searched with "PNG" rather than "graphics" so I missed that other bug. Happy for this to be closed as a duplicate; not sure if having the two very similar files, one of which causes the crash and the other doesn't is of any additional help. I did try to compare them with a binary diff but I don't know enough about the PNG data format to be able to make any sense of it unfortunately.