EMB Numbers writes: Apple's Safari/WebKit team have commented on Microsoft's proposal regarding new IE8 version targeting and the impact on existing web standards. http://webkit.org/blog/155/versioning-compatibility-and-standards/ "In addition to maintainability, an important feature of the WebKit engine is the ease with which it is deployed on limited-capability devices... These and other products all include a full-powered version of WebKit, no compromises...However, having more mode switches cuts against this. The extra code (possibly whole extra copies of the engine, at the very least a whole lot of extra if statements) would be a significant burden on mobile devices. It's not very well aligned with our mission of staying lean and mean."