Once you have created enough weapons to get the materials storage blueprint, clicking on Garett Jones no longer does anything.
The same is true once you obtain the sneaky skill from Karen Pythia, except you also get more and more hats.

Update: Seems to be true of all NPCs once their final mission is done

oh $item.370.nom is a hat?
I gathered it 5 times already :D

Also the mission from Chris Lee seems not to work propperly. Whenever I go back to see him I only made a really small progress in hitpoints while I am sure that I gained more than just 10 damage (as I died several times and had many fights)

For the Chris Lee mission the damage count is the amount you manage to prevent hitting you using resistance items (e.g. Temporary wood protection, hot chocolate). Though this should be made more clear in Chris' text boxes as at the moment it does imply that you just need to take damage to complete the mission.

Adrazaelle a dit :

Karen and Garett (village NPCs) finished talking when the given objectives had been completed and Karen would give hats at will http://atelier801.com/topic?f=652058&t=369

It seems like it is not fixed yet, I just finished Karen's objective, she gave me the skill but she didn't talk, and now it looks like she doesn't talk anymore.

Hello! We fixed what Chris Lee is saying. What's important is not the brutal damages you take, but the ones you don't thanks to an item or a skill that applies resistance to your character. Let's say you have a 10% resistance, if a zombie hits you at 100dmgs, you'll have 10 dmgs applied to your quest! Hope I explained well. For the other bugs, it's been reported to Tig, Thanks!!