Because of a mistake I made, all images which were not available from imageshack in comments with ID below 20669 contain now a "picture not available" image instead of the old dead imageshack link.
Images from comments after that will keep the old dead imageshack link even after the importation.
I'll try to get these again in the next days/weeks (as sometimes the image is not especially lost, but only not available right now). But those that were really lost by imageshack will be really lost of course; maybe many of those will be recoverable from the backup, but that'll be a manual work (most likely).