Recent scientific articles attacking running come from errors interpreting the statistics. Typically, the erroneous conclusion that running is dangerous gets lot of attention in the popular press while subsequent criticisms and ultimately correction of the statistical error receive much less coverage.
The articles published in the last few weeks suggesting that too much jogging is bad for you are an example of this. All reference the study entitled "Dose of Jogging and Long-Term Mortality: The Copenhagen City Heart Study" in the Journal of the American College of Cardiology which concluded "Our results, which were obtained by using a large random sample of men and women, showed that although joggers as a group appear to live longer than sedentary nonjoggers, light joggers and moderate joggers have lower mortality rates than sedentary nonjoggers, whereas strenuous joggers have a mortality rate that is not statistically different from that of the sedentary group... ." What they don't mention is that, while mortality in the strenuous joggers wasn't statistically different from the sedentary group, it wasn't statistically different from the light to moderate joggers either. There simply weren't enough strenuous joggers in their study to conclude anything about that group versus the others (for those with access to the article, this can been seen from the [very large] size of the error-bars for the "Hazard ratio" plot for the "fast" group at the bottom of the figure).