Target dummies do not have a loot table, making Fused Wiring an expensive commodity.
Explosive sheep does not function properly.
Gnomish mind control cap often fails. Also causes nearby mobs to aggro you, not the MC'd target.
Appears Gnomish Death Ray does not deal proper damage (or crit properly).
I believe all have been reported on the bugtracker - and there are many unanswered forum posts.
Any input from staff or otherwise?