Don't know whether this (minor) issue is fixed in 8.1.1, but mentioning it in case it's useful -- this is under Snow Leopard (Mac):
12/21/09 10:22:07 AM [0x0-0xe00e].com.ableton.live[130] objc[130]: Class OAuCocoaWindowResponder is implemented in both /Live 8.1 OS X/Live.app/Contents/MacOS/Live and /Live 8.1 OS X/Live.app/Contents/Resources/Ableton Live Engine.bundle/Contents/MacOS/Ableton Live Engine. One of the two will be used. Which one is undefined.
Occurs every time Live 8.1 is started. Guess you should define which one to keep my Console clean? <G>