I'm not sure if it's sheer coincidence or if it's relevant to Safari... but ever since I installed Safari, I've had occasional (every couple of days) lock-up of my mouse/keyboard connection.
It only seems to happen to my mouse & keyboard (Mouse is plugged-in to the keyboard) but to nothing else on my hubs.
Ultimately, I always need to move the connection from one port to another... or just remove, wait one second, then replug... and it gives me back my keyboard & mouse control.
Again... it NEVER happened before installing Safari?... and it started happening the day (or day after) I installed it.
Anyone else experiencing this phenomenon...?