Quoting the article “Google to abandon older browsers” [via @annavester]:
As a result, from 1 August, Google will only support what it calls "modern browsers". By this it means the latest versions and major prior releases of Chrome, Firefox, Internet Explorer and Safari.Radical move, but it might help move web technologies forward.As new versions of these are released, Google will get its web services working with that and then drop support for the third-oldest version.
Support in this sense means that Google will only do compatibility testing with more up-to-date browsers. It will not carry out tests with older programmes and can make no guarantees that web services will work with them.
From http://www.2ality.com/2011/06/google-older-browsers.html
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