@sangfroid: I recall there was some weird interaction with Windows regarding pulling the USB S/N, I *think* I had it handled, but then again, maybe the manual selection *was* the fix
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I'll double-check...
EDIT: Yep, there was a Windows hack, and it relied on platform-specific code that seems to be gone. I'll look into it
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@theducks: Can't tell much without a full log, but it's been so long since I've played with this that I may not be of much help...