Just something i recently figured out; you can dump objects from inside of containers onto the ground. Which of course allows you to empty seeds from bags you dont want seeds in.
Anyways, here's the bug:
In an attempt to bypass the annoying aspect that bags would always be tied up by holding dimple dye, i decided to try and "empty" the bags of the dye, and then have a dwarf put the dye into a barrel by forbidding the bag. The dye was successfully removed from the bag, and was dumped on the ground as a forbidden item (as all dumped items are)
However, here's the thing; a dwarf came along and decided to clean up the dumped dimple dye ... While the dye was still forbidden. Even odder, the game would spam "Could not find path" messages if the dwarves couldn't find a path there.
What's even sadder is that the damn dimple dye was cleaned and erased from existence. Once i removed the cleaning job from each of my dwarves and un-forbid the doorway, they put the dye in the proper stockpile... And when the cleaning job was re-enabled, they still cleaned the dye!!!
ARGH! :mad:
Thankfully it was an alternate universe, and the only thing that was lost was the time i spent figuring this out.
TL;DR version:
Forbidden objects that are normally cleaned up by dwarves (like loose dimple dye) are not exempt from being cleaned, despite being forbidden. If the path is blocked (through a forbidden door) message spam will occur.
Dimple dye outside of bags will also always be cleaned as long as 1 dwarf has the cleaning job.