Does a performance drop in 'F.E.A.R.' point to larger PC gaming problem?

As bug discoveries go, we can't technically claim to have discovered this one. Still, it seems that by stumbling upon a major slowdown in F.E.A.R. during a recent Maingear desktop review, we've come across what might be a more universal issue in PC gaming performance. We're not trying to cause a panic. F.E.A.R is the only game we've seen suffer a significant frame rate loss. But an intriguing post on the official F.E.A.R. forum indicates that the issue might be more widespread. The potential culprit? USB mice and keyboards.