Mark Wilson writes: Google has issued an apology after the automatic tagging feature of its Photos apps labeled a black couple as "gorillas". This is not the first time an algorithm has been found to have caused racial upset. Earlier in the year Flickr came under fire after its system tagged images of concentration camps as sports venues and black people as apes. The company was criticized on social networks after a New York software developer questioned the efficacy of Google's algorithm. Accused of racism, Google said that it was "appalled" by what had happened, branding it as "100% not OK".