Let me know if it starts eating registry entries or system files. I've had to replace 4-5 hard drives recently because of W7 Enterprise issues. That number may actually be higher... I've lost count of the drives I shipped out to different locations this week. I had to replace three today alone. One of the employees in my office had his file association table disappear, another stopped working altogether.
I don't know if it's a combination of the hardware and software we're running, but I've never had to deal with this kind of volume before. XP wasn't pretty, but it was stable.