I am having a very difficult time with recurrent crashes on my TDM setup. I have been using Logic 7 with DTDM with no problems. After upgrading to 8, I had a day of the same. Then I upgraded to 8.0.1. At that point, starting up the app gets a "quit unexpectedly" message right when the screen gets to the DTDM message. I can boot up without audio drivers just fine, and I can boot up with TDM on, just fine. Just not DTDM. Here is what I have done: 1) I have confirmed the crash happens on a test account, in the same way. 2) I have checked the startup drive with Disk warrior. Only minor problems found. 3) Reinstalled 8.0.0 from DVD, after trashing all receipts. 4) Reinstalled DTDM driver separately. This got Logic to boot up with TDM and DTDM enabled...ONCE. I could not replicate this. On the next bootup I got "quit unexpectedly" again. 5) Trashed any preference I could think of with even a peripheral connection to the issue. But again, since the test account crashes as well, that rules out my account. I have called Apple support twice. They were really of no help. Does anyone have any thoughts? I have spent the entire day with this, and am really out of ideas. And one last thought...PT 7.4 boots up just fine and works just fine, so I assume I'm not having a hardware issue. -Evan Benjamin