[Bug 584632]

[lengo]

(In reply to Neville Hillyer from [url=https://bugzilla.mozilla.org/show_bug.cgi?id=203810#c41]comment #41[/url])
I don't know SeaMonkey, but I can confirm this is still an issue in Thunderbird 16.0.2 (latest version on the 'release update channel'). And I don't know how recent a build TB 18a2 is, but Mike Cloaked reports (in [url=https://bugzilla.mozilla.org/show_bug.cgi?id=203810#c37]comment #37[/url] above) that it is still an issue for him.

As for a "single accurately described bug" I think this has enough
related manifestations (e.g., Mike Cloaked comment #40) to make that a
difficult precondition.

My 'workaround' used to be to type a word (usually the person's name to
whom I was writing), hit Enter, type my name on a new line(i.e., the
last thing in the message) and then move up to the end of the first
line, hit Enter again, and type (and edit) the body of my message. This
workaround worked (i.e., preserved formatting) until v. 15 (I think...
It is sometimes difficult to tell when something like this manifests,
because, from all appearances, the message looks OK [I confess, I don't
often check the formatting of the messages in my Sent folder]. I only
began noticing it in certain replies from others that had included my
message in the reply).

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https://bugs.launchpad.net/bugs/584632

Title:
  composer changes font mid email

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