Pretty much anything in the catalogue that is missing (for me). Like I said I followed this to a T so I am using the catalogue you provided.
For example, panels, curvedramp, small blocks etc are missing. Those are all black boxes when placed.
Same with the pixelduck_wall in gallery. I'm missing...
So I've followed the tut to a T but seems I'm still missing some icons and furnis. Just wondering if anyone has an up to date pack of all the files I need. Even after the whole habbo downloader stuff, theres a couple dozen things missing from the catalogue + the whole black box furni fiasco.