WordPress 4.6 Beta 4 发布了，包括以下修复：
alt attributes are now always added to images inserted from URLs (#36735).
Object subtype handling has been removed from
register_meta(). Details about this change are explained in a post for developers.
Resource hints are now limited to enqueued assets (#37385).
A regression with query alterations introduced by the new
WP_Term_Query has been fixed (#37378).
The media player MediaElement.js has been updated to 2.22.0 to fix YouTube video embeds (#37363).
The Import screen was overhauled, improving accessibility and making it much easier to install and run an importer (#35191).
Emoji support has been updated to include all of the latest Unicode 9 emoji characters (#37361).
Various bug fixes. We’ve made more than 60 changes during the last week.