534846 - Threading on TB3 won't work for messages delivered on previous TB2 installation

Status: RESOLVED INVALID

(Thunderbird :: Folder and Message Lists, defect)

Description

[Kamen]

User-Agent:       Opera/9.80 (Windows NT 5.1; U; en-GB) Presto/2.2.15 Version/10.10
Build Identifier: Thunderbird 3.0 (http://download.mozilla.org/?product=thunderbird-3.0&os=win&lang=en-GB)

Installing TB3 over TB2 would break threading for existing messages that have been received on the TB2 installation. After the upgrade to TB3 newly arrived mail refused to be matched to the old one that have been received in TB2, though in TB2 similar messages were grouped together.
This is easily reproduced - we have Bugzilla and all notification mails from it were sorted in TB2. The moment I installed TB3 new notifications were separated.

Reproducible: Always

Steps to Reproduce:
1. Install TB2
2. Set TB to group by Thread, All, sort by Date
3. Receive a couple of mails, preferably threaded
4. Install TB3
5. Receive a mail that should have been threaded
Actual Results:  
TB3 refuses to thread newly arrived mails to messages that are from the old TB2 installation.

Expected Results:  
TB3 shall thread newly arrived mail no matter in which version it was received - TB3 itself or a previous TB2 installation.

The vice versa holds true, too. After removing TB3 and installing TB2, TB2 refused to group by threads the mail that was received in TB3.

Comment 1

[Kamen]

Attachment: Screenshot

Check the screenshot - the messages in red should have been threaded

Comment 2

[David :Bienvenu]

we've turned off threading by subject without re: by default, but you can re-enable it in the config editor. tools | options | advanced, general - config editor, set mail.thread_without_re to true. You'll need to rebuild the index of affected folders to cause re-threading.

Comment 3

[Kamen]

Cool, but... No... Still not working.

1. mail.thread_without_re = true
2. Rebuilt index for all folders affected.

Still no threading...

Comment 4

[David :Bienvenu]

It works for others who had this problem. Is threading turned on for that folder? (view | sort by | threaded)

Comment 5

[[:Aureliano Buendía]]

(In reply to comment #3)
> Cool, but... No... Still not working.
> 
> 1. mail.thread_without_re = true
> 2. Rebuilt index for all folders affected.
> 
> Still no threading...
Do you have set also mail.strict_threading = true? see bug #477744.

Comment 6

[Kamen]

Yep - playing with the *thread* options and a reinstall fixed it. Than you all, guys...

Comment 7

[Kamen]

But, once again any new message was not threaded:

mail.thread_without_re  true
mail.correct_threading  false
mail.strict_threading   false

OR

mail.thread_without_re  true
mail.correct_threading  true
mail.strict_threading   true

I don't have time to fight with threading any more. Going back to 2.0.0.23.