In een bericht van 4-8-2016 17:05:
I am a bit confused. I manually messed with some files, and my MUA complained about permissions. So I got that mess fixed, and in doing so I noticed the seemingly contradictory permissions.
I can imagine the confusion. It all is depending on who/what installed the software. You have root/system permissions, user related and group related permissions.
Do not change permissions unless you know what you are doing! /Jos