I’m seeing the same here – there seems to have been an accidental loss of UTF-8 in the conversion to RTF and a switch to something reported by Applescript as class ut16
The plain copy as puts UTF8 into the clipboard
but in the conversion it’s as if utf8 wasn’t specified for an invocation of textutil or a Cocoa equivalent.
je suis éditeur של משפחה ->
the clipboard as record
"je suis Ã©diteur de ???©???—?•?ª
For an interim fix, if you want to convert the clipboard from HTML to RTF yourself, you could use something like:
do shell script "echo " & quoted form of (the clipboard as text) & " | textutil -format html -convert rtf -inputencoding UTF-8 -stdin -stdout | pbcopy -Prefer rtf"
(Note the -inputencoding UTF-8 switch)
More generally of course, you can get RTF (with all UTF8 characters) by combining FT with Brett Terpstra’s Marked