1. I got one freeze during playing Survivors, on X360. Game installed on HDD.
2. Infinite melee; I also
posted a thread about it.
3. One time, the team AI had me restart a mission; stuck shooting at a dead zombie, and wouldn't go towards the gate.
So far, these. I'll update when/if more occur. Also, I've found a
trick of some kind: if you point your crosshair at what you want to interact with, it's easier to discriminate when you press the Action button. It's helped me countless times when I was looking at my buddy's body, with his weapon just centimetres away, and I successfully revived him without any problems.