In metric mode, I wanted to shorten my dog's leash. The rope must have been 5 feet initially because it's 1.7m now. In feet, it would have let me choose between 1, 2, 3, or 4 feet, but with 1.7 m it auto selects "1" and cuts it into a 1 meter section and a 0.7 m section.
(143270):49h6:[#]{0347055F} | HANDCRAFT OPTIONS: Tying equipment
(143270):49h6:[#]{0347055F} | TYING EQUIPMENT: Shorten ropes and cords
(147870):49h6:[?]{0347055F} | How much of this 1.7 m rope you want to cut?
(147870):49h6:[?]{0347055F} | (1) You need cutting weapon.
(AB5700):49h6:[+]{0347055F} | The woodsman's axe in your inventory will be used.
(000000):49h6:[O]{0347055F} | Ok, you have all the necessary equipment!
(008000):49h6:[=]{0347055F} | You cut 1 m piece from the rope.
I'm not sure if this is a bug or not. It's a difference in functionality between metric and imperial modes, but it avoids a situation of having to choose between 0.3m, 0.7m, 1m, 1.3m in metric mode, which is a bit inelegant I guess