Hey, I got a little problem with Linux Mint 12 KDE 64 bit version: I can't change all the system settings. I somehow can't change when screensaver settings, I can't change that .iso is played be default via vlc and I can't change my standart browser. Well, first it seems to be working as it doesn't give a error when "changing" but it is all just as it used to be.
Please help me!