It turns out the particles may not have exceeded the universal speed limit. After further tests it was determined that a glitch in the GPS synchronising may have accounted for the faster time.
Science Mag: http://news.sciencemag.org/scienceinsider/2012/02/breaking-news-error-undoes-faster.html?ref=hp#.T0U_N0pYVRc.twitter
However later scientists discovered another possible glitch that made the particle appear to travel slower than reality. It is unsure which factor influences the recorded time more. As with most of science, more tests will be needed.
Science Mag: http://news.sciencemag.org/scienceinsider/2012/02/official-word-on-superluminal-ne.html?ref=hp
