Chief among the problems are connectivity issues, with users unable to get stable online matches going. On Twitter, Activision acknowledged the problems, saying, "We are aware of connectivity issues that some players are facing in Black Ops II on PlayStation 3. We are working on resolution, thank you."
Elsewhere, some customers are having problems getting their Nuketown 2025 codes to activate. These map codes were packed into the Hardened and Care Package editions of the game, and a number of users are experiencing difficulties, as this thread on the PlayStation forums indicate.
So ... these things are happening. Again.