Update: I've searched every instance of "#define" and instance of "item" in the my servers sorce, to no avail.
Also there is no debug info displayed in the server when an item with an Id greater then 32767 is listed, however said item is not generated through @item nor getitem.
I assume this is a sorce "bug" and not a client issue, I have a very extensive item_db and have not even started adding my collection of ~5k headgear (mostly recolors) I collected over the years, so I'd really like this "bug" fixed.