Another death-knoll for IE6. Hopefully the lingering user base will continue to rapidly decrease for this ancient browser. The more high-profile sites that continue to drop support for this browser the better.
I will feel more and more confident in placing a warning at the top of sites that is shown to IE6 users only which recommends that they upgrade their browser (there really is no excuse for using IE6 anymore).
Many other companies have already stopped supporting older browsers like Internet Explorer 6.0 as well as browsers that are not supported by their own manufacturers. We’re also going to begin phasing out our support, starting with Google Docs and Google Sites. As a result you may find that from March 1 key functionality within these products — as well as new Docs and Sites features — won’t work properly in older browsers.