Together with some bug fixes and minor changes to the manual, I have introduced a slightly better way of dealing with chests.
Depending on the skill of your rogue, you will see a certain number of gizmos that turn from green to red and vice versa. The number of gizmos is related to the difficulty level of the current map. With lockpicks you can eliminate those switches one by one.
Now try to touch a switch when it is green. If you don’t succeed in this, the lock will be jammed and you will have to unjam it first before you can make a another attempt. But beware: Unjamming might set off a trap.
Have fun with this new way of dealing with treasure!