I am not sure if Osiris or general engine bugs go here as well, but I'll post one here:
I tried deleting a single previously registered item with ItemHandleDelete( _ItemHandle ) but that deletes a complete stack of items instead of only a single instance if the item with that handle is on a stack.
So either a stack 'steals' an item handle from an item when it is added to it or (more likely) an item is first placed on a stack and might even get its own handle but events like ItemTemplateAddedToCharacter() return the handle of the complete stack instead of the handle of the added item.
So one call is definitely buggy and more are very likely buggy:
1. ItemHandleDelete() is buggy because it can delete complete stacks when this should be impossible
2. ItemTemplateAddedToCharacter and ...AddedToContainer are probably buggy, because they return a stack handle instead of an item handle
3. all ItemHandleMoveTo... can be called buggy, because they most likely only move the top of the stack instead of one specific item (what else could they do if they don't get correct data ?)
4. All item functions that have to do with handles are probably buggy because they treat stacks as if those were single entities instead of entity arrays. (but as said above, what else could they do if the information aquisition functions are buggy already ?)
Other bugs I found:
1. missing documentation and support
2. missing documentation and support
3. DOS/2
4. DOS/2
...
9. DOS/2 blocking any bugfixes and support
10. sometimes, the editor does NOT crash ;-)