(In reply to Deven Corzine from comment #43)
> How does such an obvious bug get filed and debated for year (2013), after
> year (2012), after year (2011), after year (2010), after year (2009), after
> year (2008), after year (2007), after year (2006)... but never actually
> fixed?

Deven, thanks for your feedback. I appreciate the frustration, as I've
often felt it myself (being an active volunteer TB QA/UX contributor
since 2007). However, we need to face the fact that TB has a track
record of unresolved bugs for a variety of reasons. Where this bug is
just one out of many, and the choice of "important" bugs to start from
is pretty vast.

TB is now maintained almost exclusively by volunteers, so getting this
bug fixed requires a volunteer who is a) able, b) willing, and c) has
the time to actually fix this, and d) an agreement about the exact goal
of this bug, the desired UX how it should be fixed. a) and c) are the
hard parts, whereas I'd consider d) a non-issue in this case (although
looking at the entirety of comment 0, to which comment 12 responds, I
suspect misunderstandings about d) also contributed to the long latency
of this bug).

> This worked in Thunderbird 2, which means it's a regression bug, not an
> enhancement.

Deven (and others before), thanks for pointing that out. Understanding
the nature of a bug and documenting that as precisely as possible in the
bug report is crucial.

Indeed, this looks like a bug because it violates the very purpose of
the nickname design, which is a 1 on 1 relationship between the (ideally
unique) nick and the card, to allow user to retrieve and distinguish
that card efficiently and consistently from all other cards. (As a
caveat, note that TB is not enforcing uniqueness of nicks!). As has
often been said in this bug, users correctly expect from the intrinsic
purpose of nickname design, that nicks should have absolute priority in
searches, which includes priority over frecency. Frecency is a way of
automatically establishing dynamic nicks, but certainly nicks that have
been purposefully and explicitly defined by user must take precedence
over that (why should I add "wil" as a nick to my uncle's card if I
don't want "wil" to find that very card?). Users who want the frecency
algorithm to take highest precedence probably wouldn't (and shouldn't)
define explicit nicks.

Due to violation of these imo correct, established, and widely-evidenced
user expectations, this is a bug in terms of UX error prevention where
users can easily inadvertently send the msg to the wrong recipient(s),
which is a major violation of their privacy. As such, this bug also
undermines UX trust in TB as an application, as repeatedly stated here
in line of comment 0 and comment 43:

> You may not think this is important, but anything that causes mail to get 
> sent to
> the wrong user inadvertantly is just about he worst possible problem a mailer 
> can have.

> There has been ample evidence that this seemingly-minor issue
> is a major source of frustration to many users, even to the point of
> abandoning Thunderbird entirely.  It may be a little thing, but that doesn't
> mean it doesn't matter.
> 
> Instead of debating the best algorithm for years, why not at least add a
> special-case check for an exact match of a unique nickname, before going
> into the current algorithm?  That would satisfy the critical use case,
> making most of the frustrated users happy.  A special-case should be trivial
> to add, for anyone who knows the code, so why hasn't that much been done
> after nearly 8 years of this ticket being marked as NEW?

See my remarks further up in this comment. Getting bugs fixed in TB is
often less trivial than it looks, for a variety of reasons...

FTR: I agree that the obvious solution to this bug (as required by the
intrinsic principles of "nicks" design concept) is to list fullstring
matches on nicks at the very top of the recipient autocomplete dropdown,
so that they take highest precedence (even before frecency if we
implement that). Btw FF works the same way for keywords: Keywords (not
tags, nor frecency) take absolute highest priority over any other
matches. Think of keywords and nicks as an ALIAS for the real thing.

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https://bugs.launchpad.net/bugs/956618

Title:
  Nickname not over-riding names in email address

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