That's right. I plugged in my Traveler after the MR died to get back to work and it saw it as an MR and did something to the internal rom making it unusable on any computer. I never sent it in for repair, I just use it for field audio now (for video shoots) as it still works fine standalone, just not as a firewire device on any computer I own. It would cost me $150 to repair it.
Wow...that seems really bizarre, maybe someone from Steinberg could comment? The Steinberg drivers just sit in my computer, they're around on startup and I haven't bothered to delete them from the startup menu. I've used a bunch of FireWire devices and haven't experienced any problems. Hmmm...
Are you sure it's not a case of the FireWire port itself being fried if you hot-swapped? While rare, hot swapping can destroy ports. This is why I always say in articles to make FireWire connections with power off to all units, and failing that, with power removed from at least the peripheral.
Haven't tried the digital I/O yet, been fixated on the processing and pres, but will investigate that aspect further.