User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0 When composing plain-text messages, if the last thing on a line preceding an automatic line wrap is the end of a sentence followed by two spaces, Thunderbird moves the second space to the beginning of the next line, leaving the text looking indented. This is particularly annoying because this is not visible in the composition window; you can only see it after the message has been sent. This gives the reader the misimpression that you intended to start a new paragraph. Since it is conventional when typing to leave two spaces after the period between sentences, this problem happens all the time. It has always existed in Mozilla. In principle, if the recipient's mail client respects "format=flowed" then they shouldn't see the leading space. However, when the message is forwarded or quoted for reply then the leading space is preserved, and looks wrong even when viewed in Thunderbird. Plus, many clients don't respect flowed format yet. Reproducible: Always Steps to Reproduce: 1. In the options dialog, set a line-wrap length. 2. Start composing a message. Make sure the last word on the line, prior to the line being wrapped, ends with a period. Then type two spaces after the period before starting the next sentence. 3. Send the mail to yourself. 4. When message is received, view the message source and see the extra space at the start of the wrapped line. 5. Reply to the message, including the original message, and see that the extra space is plainly visible in the quoted text. Expected Results: Word-wrapping should never move spaces to the beginning of the line when the message is formatted for sending. Leave the spaces at the end of the previous line.
See also bug 223279. *** This bug has been marked as a duplicate of 202195 ***