Yes this is a HUGE issue. I experienced this as well when I was able to handle a unit at Radio Shack. It gets random errors, unfortunately I didn't have time to play with it enough, but it really was a smack in the face. What worries me even more, the manager said he replaced the card with his own and its still getting errors. Here's the sick part:
If this is a software issue, great, hopefully a fix will be soon.
If this is a hardware issue, we are all screwed. We'll have to probably get refurb or hopefully a new unit down the road.
IMHO Changing the card isn't going to help.