471422 - Thunderbird deletes a blank space, seemingly arbitrarily from outgoing emails

Status: RESOLVED DUPLICATE of bug 406326

(Thunderbird :: Message Compose Window, defect)

Description

[Jon]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5
Build Identifier: Thunderbird version 2.0.0.18 (20081105)

I've started noticing that, seemingly randomly, Thunderbird will delete empty lines. It always seems to happen happens when there is whitespace at the end of a line... An email program can't possibly be usable with this sort of shockingly obvious flaw that completely changes the look from WYSIWYG to reformatting unexpectedly. This happens in plain text mode.

Reproducible: Always

Steps to Reproduce:
1. Type some text, and then hit "space" 
2. Hit "enter" twice
3. Type some additional text
Actual Results:  
There is no blank line between text from (1) and (3) ... One would expect that the above steps WOULD NOT produce the same result as if (2) had read "Hit 'enter' once" ... but it does. 

Here is what one gets....

<text from (1)>
<text from (3)>

Expected Results:  
<text from (1)>
<blank line>
<text from (2)>

This should be patched immediately!!!

Comment 1

[WADA:World Anti-bad-Duping Agency]

> happens when there is whitespace at the end of a line...

What charset do you use in mail composition?
AFAIK, if single byte character(including UTF-8) is used, format=flowed is enabled. Check it by "Save As Draft" or "Send Later" followed by "View/Message Source".
Is mailnews.send_plaintext_flowed=false a effective workaround in your case?

FYI. 
To avoid format=flowed, DBCS charset such as ISO-2022-JP is a workaround of "format=flowed". Because "format=flowed,DelSp=Yes" in composition is not supported yet, "format=flowed" for such DBCS charset is currently disabled.
Do Google Search for '"format=flowed" "delsp=yes"', please.

Comment 2

[Jon]

Setting "mailnews.send_plaintext_flowed=false" to false does seem to work. However, the FAQ's all claim that this will, possibly, mangle messages on the other end. It's unclear why a trailing space should cause a line to be deleted... still seems like a bug where I should be able to have flowed on and be able to send with a trailing space on a line before a blank line (verrrryyyyy common when one edits and already-composed email....).

Comment 3

[[:Aureliano Buendía]]

It's a dupe of bug #406326  that is closed as WFM, because it work in 3.0 and 2.x is a stability and security release branch.

Jon update to TB 3.0 ;-)