The Guardian reported yesterday that Microsofts search engine Bing appeared to be censoring information for Chinese-language users in the United States as it would censor results in mainland China. Microsoft has denied the allegations, blaming the exclusion on a technical error. Chinese-language searches for controversial topics found different results The author of the blog, Charlie Smith, said he found the differences while searching for FreeWeibo.com, a site that allows anonymous searching of Chinese social networks and blogs.