Internet Explorer 6 China and South Korea. A common criticism of Internet Explorer is of the speed at which fixes are released after discovery of the security problems. Microsoft attributes the perceived delays to rigorous testing. A posting to the Internet Explorer team blog on August 17, 2004 explained that there are, at minimum, 234 distinct releases of Internet Explorer that Microsoft supports (covering more than two dozen languages, and several different revisions of the operating system and browser level for each language), and that every combination is tested before a patch is released. In May 2006, PC World rated Internet Explorer 6
Internet Explorer 9 Futuremark's Peacekeeper browser benchmark. Internet Explorer 9 scored 95% on the unofficial Acid3 standards test. Michael Muchmore's first impressions in "PC Magazine" were broadly positive, praising features of the InPrivate mode (which "I'm surprised other browser makers haven't included") and concluding that Internet Explorer 9's tracking protection was "more flexible and comprehensive" than Mozilla's. The review reported that Internet Explorer 9 "now wins the SunSpider JavaScript Benchmark" and had achieved "a hefty improvement" on Google's JavaScript benchmark – though it was still far behind Chrome 9. However "in normal browsing, I was hard pressed to see a [performance] difference between