I have heard conflicting reports that the fault wasn't with the magnets but to do with the general safety systems. Your report appears to concur with mine from the BBC. I guess they may still be doing an assessment of the causes and for something so complex there may be several interrelated elements that are the problem.I was coming to post something similar. All I can say is... damn.
http://www.msnbc.msn.com/id/26802846
At least it wasn't legal action. That can be more damaging in the long run.
Dave