You can get an email when a page on your watchlist was edited. You can choose not to get emails for minor edits. There is a bug that means that you then don't get an email when someone does a normal edit after a minor edit. The developers are working on fixing this. Until it has been fixed you can activate "Email me also for minor edits of pages and files" at the bottom of "User profile" in your preferences if you want to. 
The thanks button sometimes didn't work for mobile users. This was because of a new bug and has now been fixed. 
Changes later this week
The new version of MediaWiki will be on test wikis and MediaWiki.org from 8 August. It will be on non-Wikipedia wikis and some Wikipedias from 9 August. It will be on all wikis from 10 August (calendar).
Editors and readers who still use Internet Explorer 8 on Windows XP will not be able to use Wikipedia. Internet Explorer 8 on Windows XP can't connect securely to the wikis. When we allow them to do so it means that we get less security for everyone else. If you use Internet Explorer 8 on Windows XP you can install Firefox 52 ESR instead. Around 0.1% of the traffic to the Wikimedia wikis comes from Internet Explorer 8 on Windows XP. 
Links to sections on Wikipedia don't work well in languages that don't use the Latin script. The URL in the address bar in your browser shows Latin characters like .D0.A1.D1.81.D1.8B.D0.BB.D0.BA.D0.B8 instead of the section heading in the wiki's language. Links to sections in non-Latin scripts will be in the script of that wiki in the future. This will happen in the next few months. 
Wiki pages printed by the web browser "Print" function will have an updated style. This new style will be similar to the when you download a page as PDF. It will be better at showing tables, infoboxes and headings. 
Latest tech news from the Wikimedia technical community. Please tell other users about these changes. Not all changes will affect you. Translations are available.
Bureaucrats can now set users as confirmed. Previously only stewards could do this on most wikis. Nothing will change for wikis that have previously decided to let administrators set users as confirmed. 
The symbols in the language list that show that an article is good or featured in that language doesn't work. Links to the Commons category in the sidebar doesn't work either. The developers are working on fixing it. 
Changes later this week
The new version of MediaWiki will be on test wikis and MediaWiki.org from 15 August. It will be on non-Wikipedia wikis and some Wikipedias from 16 August. It will be on all wikis from 17 August (calendar).