Some notes from my experience upgrading Twisted’s buildmaster installation:

• Jinja2 is at http://jinja.pocoo.org/, not the URL in the BuildBot docs (perhaps fixed by https://github.com/djmitche/buildbot/commit/851b8d74141d2dbf8351e67cf8f3e3c1bb7bbc2e)
• simplejson was already installed, but BuildBot’s “setup.py install” easy_installed another copy of it anyway
  
• buildbot.status.html.Waterfall is really gone now
• The “path_to_root” method of buildbot.status.web.base.HtmlResource is gone, but there is a free function of the same name in that module that does the same thing
• The HtmlResource method to override to generate content is now “content” not “body” and takes an extra “context” argument (perhaps fixed by https://github.com/buildbot/buildbot/commit/bf9e03061f9c3442b2740addaee464b0dd4b678c)
• The build history format has been upgraded again, meaning that the master will now spend the majority of its time loading old pickles, upgrading them in memory, using them, then throwing them away so that it has to do the work all over again next time (perhaps fixed by https://github.com/buildbot/buildbot/commit/95f33ad1bd65b5fa06e0fc4614830b1cb04d52db)
• Some unpredictable quantity of build history from before upgrading will still appear in the web status views, but not all of it
• public_html/index.html will be moved to templates/root.html by the master upgrader