Recently, Jose posted:

[...] But sorting trees by subject line is
problematic, and that's how I'd like to sort them.

OE sorts trees by subject line, but if the subject line changes, you get a
new tree root if read files are hidden.

I really don't see a way to resolve all of the possible ways that readers
deal with thread headers into a universally consistent practice. Someone
will always come up with an app that does something wacky.

Neil