Over the next few days, wmf20 will be deployed to WMF wikis. The highlights of what's new in wmf20 are:

• "Recently active topics" is now the default sort order in Flow.
  
• Searching the Topic namespace doesn't return any results, so it has been disabled to avoid confusion.
• A number of editor-related bugs and regressions in Flow were fixed:
• Clicking "Reply" on a nested reply no longer opens multiple editors
• CAPTCHAs no longer appear as HTML and can actually be submitted
  
• Clicking the "preview" link in the wikitext editor scrolled to the top
• When switching between editors, the editor retains focus, and the cursor is put at the end, not at the beginning
• Translations for the Topic namespace were added in Western Balochi and updated in Mazandarani. Special page aliases were added for Persian.

wmf20 is being rolled out according to the standard deployment schedule:

• Tuesday 11am-1pm PDT (yesterday): deployment to test wikis ("group 0"); for Flow, these are testwiki, test2wiki and mediawiki.org
  
• Wednesday 11am-1pm PDT (about 2 hours ago): deployment to non-Wikipedia wikis ("group 1"); for Flow, these are meta, officewiki and wikidata
  
• Thursday 11am-1pm PDT (tomorrow): deployment to Wikipedias ("group 2"); for Flow, these are the English, French, Hebrew, Portugese, Catalan, Telugu, Russian, Punjabi and Chinese Wikipedias