It could definitely be some kind of Firewire related bug.
Let's do this: generate a System Profiler report with the drive attached. Save it (with File | Save) to the default (XML) format, and send it to support at shirt-pocket dot com (don't attach it here), along with the panic log. I'll take a look and reply, and we can post a summary up here to not leave the thread hanging.
Sound reasonable?
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--Dave Nanian
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