An earlier issue of Tech News said that the citoidAPI would handle dates with a month but no days in a new way. This has been reverted for now. There needs to be more discussion of how it affects different wikis first.
MediaWiki:Pageimages-blacklist will be renamed MediaWiki:Pageimages-denylist. The list can be copied to the new name. It will happen on 19 May for some wikis and 20 May for some wikis. Most wikis don't use it. It lists images that should never be used as thumbnails for articles.
The new version of MediaWiki will be on test wikis and MediaWiki.org from 18 May. It will be on non-Wikipedia wikis and some Wikipedias from 19 May. It will be on all wikis from 20 May (calendar).