As requested by Pertex, here is an example of an error caused when using the command "drop all." It's specific to dropping objects that are open containers, and is a particular problem when an object is a surface containing implemented scenery objects as the scenery object.

From the attached game:

You are in a room.

> drop all
remote control: You drop it.
button: You are not carrying it.
random object: You drop it.

The button is a scenery object on a surface container, the remote control.

My suggested addition in the feature suggestions isn't universal enough to cover non-scenery items that are within open containers though. A better solution would probably be to only list the direct children of the game.pov and write the non-scenery children of those objects in brackets as it is done for the inventory.

It's not a problem of scenery objects. If you drop a bag first then you can't drop anything from that bag any more. Best thing , as you said, would be dropping all direct children of game.pov and not the complete inventory