X-COM Freeze on alien opening door

[ImpalerWrG]

On two occasions I have had the game freeze during the alien turn which effectively never ends and I never regain control though I see the environment and mouse cursor, the action triggering the freeze is visible and has been the same in both cases. An alien opens an internal door of the UFO and is face to face with one of my troopers, I had the Sneaky AI setting on and in one instance the alien was carrying a stun launcher.

[caiiiycuk]

I think that updating source will help. I have plan to update xcom in couple of months.

[ImpalerWrG]

I should have mentioned, I've been playing in browser at http://epicport.com/en/xcom/browser, how frequently if at all is this updated?