First, the appz seems to run fluidly, and that wasnt the case with previous versions. Zooming, switching from session/arrangement views - the whole program is now running smoothly like it should with a E6600 core2duo.
Projects load quickly and saving takes 2 seconds (with 8.1, it could take sometimes several minutes !)
But most of all... I can load some projects that wouldnt open anymore (and that makes me very happy) or crash the app. The 'not enough memory' error seems to be fixed
I noticed one bug, though : when deleting some clips in the arrangement view, and hitting Ctrl-Z (Undo), weird things happen : some clips dont seem to get back to the exact time they were before deleting them (half a second or less). Or Live would play a fucked-up noise instead of the right clips. One tiny bug i do hope to see fixed in the next version.