There is a bug I have recently discovered, in which a subject line prepend (such as TN) which is followed by a colon, when replied to by certain readers (OE being one of them), will lose the prepend, generating a new subject line (which will be sorted elsewhere in the alphabet). Essentially, whatever is in front of the colon is eaten, and replaced with "re".
Subsequent readers who view by subject line will see two lists - one which begins with the prepend (TN) and is sorted under the "T"s, and another which begins with the actual subject, and is sorted wherever it falls in the alphabet. I'd always wondered how that happened, I recently discovered the mechanism. Some readers, to avoid re:re:re:re:... check for the string "re:", but others check for anything in front of a colon.
To avoid this bug (which affects the thread, and thus "other people"), posters could choose to not follow a prepend with a colon. i.e., instead of TN: Moosetoes Chardonnay use a subject line that reads TN - Moosetoes Chardonnay
There is a discussion about this in rec.aviation.piloting if you're curious. I mention it here because a lot of people use "TN:" as a prepend.
That is all. :)
Jose