The article you link to seems to have gone through the usual science press mangle.
A
slightly fuller account on ZDnet goes into a bit more detail on the nature of the technical problems. It also passes on a statement from CERN's spokesman that even if these problems are verified it doesn't necessarily mean that they were extant at the time of the previous experiments.
So a definitive answer will need the problems to be eliminated and the experiment performed again. It does seem quite likely that the result is going to be that the fault giving an overestimate was the cause of the previous results, just on the grounds of it being a more reasonable explanation than a huge tranche of our current understanding of physics being radically wrong.
TTFN,
WK