Hi Brian,
I I understand you, The Power off, reboot and software update worked for you OK.
However you tried to load the same CD as before and the B2 "crashed" again.
If I have understood you correctly then it would appear there is something mysterious about that CD - try ripping it on your PC then using the B2's Web UI to load it from there.
Also as you have managed a good Web Upgrade already you don't need to do this again - just power off the B2 wait 30 seconds then power it on again to clear the problem.
Hopefully it will only be this one CD that is causing the problem. (try a different one and see if this rips OK).
Fred