Unity Web Player does not respond to mouse clicks

I’m running Unity Web Player on Windows 8, and in many games the web player does not respond to my mouse clicks, especially while other keys are pressed (e.g. moving while firing). This happens to me while playing the Superhot prototype, as well as any other unity shooters I’ve tried. I’m not sure when this problem started. It hasn’t always been an issue on this machine and OS though. I tried uninstalling and downloading the latest web player with no luck. Any help or reports of similar issues would be appreciated.

tried another browser?