Today I have tried to change my key settings. I wanted to switch the buttons for crouching and sprinting (Ctrl and Shift). After I respawned the old settings were back so I changed it again. Then I was unable to duck at all.
Yes, I've been having the same problems as well. Originally, I had installed V1, then I installed V4 or 5, then updated from there. But somehow my installation got corrupted after a crash, and I couldn't load up the game without crashing. After reinstalling though V 1>6>.1>.2>.3>.4 I now can't change my key settings in-game. It just does nothing. What it says in the console is "Couldn't access user.cfg" or something, then it says right afterwards "Wrote user.cfg". I've tried adding in my controls to the autoexec.cfg and the defaultsomething.cfg, but it doesn't help.
My config.cfg contains this and my scout.cfg looks like this As you see, I just want to change the keys when I play as scout. I tried it out: Scout has the standard settings like in config.cfg.