605502 - Spaces can disappear when a saved draft which uses the QP encoding and format=flowed is edited

Status: UNCONFIRMED

(MailNews Core :: Composition, defect)

Description

[Nils Anders Danielsson]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.9.2.10) Gecko/20100922 Ubuntu/10.10 (maverick) Firefox/3.6.10
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.9) Gecko/20100922 Thunderbird/3.1.4

Saving a message as a draft and reopening it for editing can corrupt the message's text.


Reproducible: Always

Steps to Reproduce:
1. In a fresh profile, set mail.strictly_mime to true.
2. Create a new plain text message containing the following line:
   "                                                                 ∀ x"
   (65 spaces, a universal quantifier, a space, and an x).
3. Save the message as a draft.
4. Close the message.
5. Edit the draft.

Actual Results:  
The space between the universal quantifier and the x has disappeared.

Expected Results:  
The space should not disappear.

Relevant message headers:

Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: quoted-printable

The line is stored as follows:

                                                                  =E2=88=80=
 x

Note that the QP encoder has inserted a soft line break before the lone space character. I suspect that the line " x" is interpreted as being space-stuffed; the problem goes away if I set mailnews.send_plaintext_flowed to false.

Comment 1

[Ludovic Hirlimann [:Usul]]

Is this on a local draft folder ?

Do you reproduce when Thunderbird is launched in -safe-mode (http://support.mozillamessaging.com/en-US/kb/Safe+Mode) ?

Comment 2

[Nils Anders Danielsson]

It doesn't matter if the draft folder is local or remote.

I can reproduce the behaviour also in safe mode.

Comment 3

[Wayne Mery (:wsmwk)]

duplicate?