Hi, I upgraded my system from 10.7.4 to 10.8 DP4 then to 10.8 GM, on a MacBook Pro 13" mid-2010. I'm really enjoying ML so far, but it seems that Gatekeeper isn't working : i can use ANY applications on my computer just like I did with Lion. I checked in the system settings, security, and it's set to Mac App Store and identified devs. Is this normal ? Thanks.