PC version Black Ops still has issues

A combination of stuttering and lag
The lag seems to be more pronounced in the multiplayer modes, while the stuttering issues that max out the CPU seem to be worst in the moments in the game with the least amount of action or in the cut scenes, for example. Speculation seems to be that a memory leak might be the problem, but so far that is just speculation from what users are reporting.
Treyarch has not officially responded to the complaints, but some forum posts confirm that they are aware of the issue and are working on the problem. At this point there continues to be no official word of when to expect a patch, but we believe that they are working on one.
The reported PC server browser issues that seemed to have been a problem right at launch have apparently been resolved by some server side adjustments, according to the whispers that we hear.