From Meta, a Wikimedia project coordination wiki
Template loop detected: Template:Tech header/en
- There was a problem caused by too many requests to the database on November 14. 
- MediaWiki 1.23wmf4 was added to test wikis on November 14. It will arrive to non-Wikipedia wikis on November 19 and all Wikipedia wikis on November 21 (calendar).
- The new Search tool (CirrusSearch) will be added to
*.wikimedia.org, Wikimania and Wikisource wikis on November 19, and Wiktionary wikis on November 21 (except where it's already available). Once it is added, you can test it by adding
&srbackend=CirrusSearchto the address of the search results page. It will become the main search engine on Wikivoyage wikis on November 21. 
- The MassMessage tool will be added to all wikis on November 19 instead of November 14. It will make it simpler to send messages across wikis.