Article by David Walker 2 February 2009 at T3 gadget website
Apparently someone at Google inputted the symbol '/', which contrived to label all sites as unsafe for a portion of Saturday afternoon (UK time). This left all sites in the Google universe classed as unsafe, with the warning 'This site may harm your computer' appearing under the website name. Even if you went to Google, Google Maps, Gmail or indeed any other Google site.
Initially, Google blamed the non-profit website StopBadware.org, but later changed tact and offered up a new statement taking full responsibility.