I recently tried to address the OP of this question in a comment. The auto completion doesn't work (at least not for me).

How can I (theoretical) call him? Is this a general problem of user, having a name like "X Lalala"?

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    $\begingroup$ The username auto-completion (invoked by <Tab>) appears not to work if the username is redundant, because the target is already a default recipient. E.g. here @draks would be redundant, so it will not complete. $\endgroup$ Jul 19, 2012 at 19:28

1 Answer 1


Since no one else has commented yet, the only person you could be replying to is the OP, so the system removes your @-reply (and also will refuse to auto-complete it if you start typing it). See this meta.SO post and the more general info about @-replies.

  • $\begingroup$ Ah, I see, thanks. $\endgroup$
    – draks ...
    Jul 19, 2012 at 19:27
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    $\begingroup$ One important addition is that it will complete if other people participated in the comments thread as well. $\endgroup$
    – Asaf Karagila Mod
    Jul 19, 2012 at 21:04

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