I suppose the 'Any Browser Campaign' (http://www.anybrowser.org/campaign/) is not their cup of tea.

""Anyone who slaps a 'this page is best viewed with Browser X' label on a Web page appears to be yearning for the bad old days, before the Web, when you had very little chance of reading a document written on another computer, another word processor, or another network." -- Tim Berners-Lee in Technology Review, July 1996