457236 - Forwarding a message can result in mangled text. Replying to the same message does not pose a problem.

Status: RESOLVED DUPLICATE of bug 307023

(Thunderbird :: Message Compose Window, defect)

Description

[Evert Mouw]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1
Build Identifier: TB 2.0.0.17 (20080914)

Forwarding a message with 2-byte characters (UTF8) goes amiss because the encoding (UTF8) is "forgotten" by Thunderbird. This is not the case when replying a message (that works). A workaround is to reply and then to change the recipient(s). Another, more interesting workaround is to change the encoding to some random value (view --> character encoding --> random) and then to change back the encoding to UTF8: the message can now be forwarded without problems.

It's probably a message edited in Microsoft Word, which results in garbage HTML. Nonetheless, replying that message does not result in mangled text. Only forwarding the message goes wrong. I think that TB "forgets" the correct encoding when forwarding a message.


Reproducible: Always

Steps to Reproduce:
You can download the entire message that shows this mangling when being forwarded. The file is encrypted with Ncrypt (http://ncrypt.sourceforge.net/). Please email me ([url][e-mail][/url])for the password.
http://www.evert.net/temp/fw.eml.ncrypt
Actual Results:  
some mangled characters

Expected Results:  
same characters / same encoding as the original message

version 2.0.0.17 (20080914)
The problem can be reproduced on older versions, with other user profiles and no add-ons.

have a look at my screenshots:
http://forums.mozillazine.org/viewtopic.php?f=31&t=872595&p=4577835#p4577835

Comment 1

[WADA:World Anti-bad-Duping Agency]

According to your post to the thread of MozillaZine forum, mail header is as follows.
> ------=_NextPart_002_003B_01C91EFD.C1445590
> Content-Type: text/html; charset="utf-8"
> Content-Transfer-Encoding: quoted-printable
Really charset related problem(encoding (UTF8) is "forgotten")?
Problem upon "HTML with quoted-printable"(i.e. DUP of Bug 307023), isn't it?

> Another, more interesting workaround is to change the encoding to some random value (view --> character encoding --> random)
> and then to change back the encoding to UTF8:
> the message can now be forwarded without problems.

It sounds for me to be an evidence of DUP of Bug 307023.
 - By "view->character encoding->random, then to change back to UTF8",
   "already decoded" flag is set for original "HTML with quoted-printable" data.
Read Bug 307023 Comment #36, please.

Comment 2

[Magnus Melin [:mkmelin]]

Duping, this should be fixed on trunk.
http://ftp.mozilla.org/pub/mozilla.org/thunderbird/nightly/latest-trunk/