Science is always in flux and the theory of evolution is no exception. Recently David Lordkipanidze et al. discovered a fossil of a skull which appears to have belonged to Homo Erectus in Dmanisi, a small town in southern Georgia. This significant discovery seems to suggest that some of the Homo species previously identified in the same region are more likely variations of Homo Erectus. As the authors make clear, its not that the previous science was bad or wrong, but that the science needs to adapt in light of new results.
The Guardian has some nice coverage of this work, including this introductory video below and the article here. If you have access to Science you can read the article for yourself here.