Fixed an issue causing no sound output in games that open and close audio devices quickly like Super Blood Hockey. Stability and security improvements.

Pretty short list, although I’ve run into some games with audio output cutting off, so if this fixes it I would be pretty happy with it.

There is also a recent Steam Client Beta update:

Fixed gamepad controls intermittently not working in store browser Fixed crash when playing back certain media in Steam music player Fixed some causes of steamwebhelper crashes