Ableton Live has in the last few hours posted a new update for Live 4.0.1 to 4.0.2.
This should according to the Ableton forum fix the sample rate bug that was not fixed within Live 4.0.1. Thought this was a worthy post since the bug effects working in Protools with Rewire with the problem being am on a mac G5 in OS 10.3 using Live 4 and Protools 6.4. I am running all my Protools sessions at 24 bit 96 kHz. When launching Live 4 as a rewire slave everything comes out at the wrong pitch, when I check the audio setup it says that Live 4 is running as a rewire slave at 44.1 kHz and there are no options that you can change in that menu. That's the best I have for now.

ps clouvel : list of bugfixes : program change messages sent to the ReWire Slave were not correct, crash when loading a document containing Reaktor (as AU), crash when a long song with tempo automation was rendered, rendering MIDI tracks would produce corrupt audio files, crash when trying to record files larger than 2 GB, some plug-ins did not locate content, missing notes when using the Novation Remote25, crash on Mac OS 10.1.5 , and more.....