I still get a 404 on that add ticket URL.
Anyway, having tried drivers 7.1.9, 7.2.1, 7.2.3 & 7.2.4 - with both Mountain Lion & Snow Leo CoreAudio (as was suggested on another thread) I arrive at ...
... swapping CoreAudio does me no favours, it kills my internal speakers & doesn't change the L6 driver behaviour at all.
Any version since the ML fix (7.2.1, 7.2.3 & 7.2.4) suffers from the total cessation of all audio, UX meters dead, after anywhere from 5 minutes to an hour or more. Only a reboot will bring it back. I tried relaunching Cubase etc, no difference. Anything using the UX2 is silent, iTunes, anything. Internal speakers still work [when I'm not using the Snow CoreAudio]
7.1.9 is better for me overall. I get the occasional crackle, it seems to find it harder to keep playback smooth when the machine's under heavy load - but when it does, all I need to do is drop to the Finder & back to Cubase again. I have 'release ASIO driver in background' set. It's better than having to reboot.