@username in comments doesn't autocomplete for some users
1419
How do comment @replies work?
69723
Occasionally, the Unicode character sequence U+200C U+200B (ZWNJ ZWSP) is inserted into comments
134993
My name includes space - How do I enter my username when typing command?
7147
Allow for setting comments to "auto-expire", to become "temporary comments"
134187
Name finding problem with comment notification feature
46311
Expand the username auto-completion to everyone who can be notified
157628
Autocomplete username references in answer posts
58991
How do I enable comments for user profiles?
149870
URL not handled correctly in Comments
60429
Why is the "user was removed" message so vague?
2102
How do you disable browser autocomplete on web form field / input tags?
134869
URL should not count towards a comment's character count
72668
Dealing with "difficult" usernames in targeted comments
16701
Flair for Unicode usernames broken
110573
Rep in User Dropdown doesn't match rep in User Profile sometimes
39538
Is there a W3C valid way to disable autocomplete in a HTML form?
32317
Code Formating in Comments