From Ableton forum - http://forum.ableton.com/viewtopic.php?f=1&t=141021.
Ableton's developers have been busy improving quality and we have released the latest result of this ongoing effort, Live 8.1.5:
The changelog is still being written and will be posted here tomorrow (12 August).
Gerhard Behles, CEO
Bernd Roggendorf, CTO