I use a lot of boulder traps when I don't feel like using any of my men on defense. Besides the boulders being over powered (Until thieves can bypass and disarm them). Imps, up to all of them can sometimes get stuck trying to replace the same trap. To bypass this you have to remove the right boulder and continue this until all of the imps have placed their trap. When the trap is new, imps do not have a problem. They do when the trap is being replaced.
Kind of annoying behavior and not a bug. Traps are not placed in storage and I think they should be. They stay where they were created until they are used. I also think traps should be place-able with a character that has the appropriate skill, possibly taking 5 turns to do so.
