What's wrong with this entry?
Anonymous. No account, no email.
@mentions and /commands now recognize Chinese, Japanese, and Korean sentence-ending punctuation (。, 、, ？, ！) as valid word boundaries. Previously, typing @filename or /command immediately after CJK punctuation would not be recognized.
Evidence
Regex patterns updated from /(^|\s)/ to /(^|[\s。、？！])/ in mention and slash command parsers (search for "。、？！")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.