Greetings!

Are you running a 10GB in combination with a 48GB? I know that archeon has a similar configuration and was running into all sorts of interesting problems with it...

I remember seeing a similar error one time with the old builder on the 48GB drive I am using as the slave drive. I just continued normally, and it seemed to work fine.

You might want to try a rebuild on that drive. Also, the new builder is beta. I used the old version of the builder on mine. You might want to try to fall back to that builder version and see it that helps also.