Yes, I know of this and it scared the hell out of me too.
I wish I could verify.
The WD1200 hard drive I have, brand new, will Not lock to save my life.
Lucky, I have 2 xbox's.
The another with a matrix chip and a maxtor HD that works fine for Live.
However, I did purchased 2 PC-BIOXX chips at the same time
and because, at the time, everything was all well with Lik-Sang I sold the chip and
installed it into a friends xbox for him.
We have been playing on Xbox Live ever since.
I dont know if we both have the same version or not becuase I did not pay attention at the time.
Ironically I get a chance to visit that friends in the next few days. (He lives very far away)
I will open it up, check out the version number and report back.