During this time we will be deploying all of the changes listed on this page. Most notably, clobber support for all Mercurial based builds will be landed tomorrow. More on that soon from Chris AtLee soon. This will affect all trees: Firefox (mozilla-central), Firefox3.1 (mozilla-1.9.1), Tracemonkey (tracemonkey), and Mobile (mobile-browser). One of these requires a full Buildbot master restart - so expect some spurious burning. We'll do our best to minimize it and get things green ASAP. If there is any reason why we shouldn't go ahead with this please e-mail release@mozilla.com.