I have been unable to unfriend people for some time which isn't a huge deal but then it became one when I meant to block someone and now they're my friend and I always see them online. I've added them to my block list already and still nothing.
I have also been unable to unfriend people I've accidentally added as a friend. Sort this out Ingix, very poor form from you.
Sorry for that.
It's a general problem that the dev was working on but it seems to be more complicated than it appears. That's all I know about the current state of the problem.