[osol-help] The dreaded "bad PBR sig" problem

[Anon Y Mous]

I just encountered this "bad PBR sig" problem for the first time myself today. 
I had three drives in a mirrored pool with 2008.05 installed on it and I 
installed 2008.11 over one of the drives in the mirrored pool and now when I 
boot up the drive that I didn't install 2008.11 on, I get this "bad PBR sig" 
error. Does anybody know what it means?
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