(Fixed as of the rv:1.9a2pre Gecko/20070127 Minefield/3.0a2pre nightly trunk build.
Please check for regression before the Firefox v3.0 release. -- Fote)

Persian Word
children  (bachche-hā)
with a ZWNJ (U+200C)
or HTML entity ‌

Directly in document
بچه‌ها ;HTML entity &zwnj    بچه‌ها raw utf-8 ZWNJ

Dynamically, using innerHTML



String of Persian Heh's (U+0647)
each separated by ZWJ (U+200D)
or HTML entity ‍ and a space

Directly in document
ه‍ ه‍ ه‍ ه ;HTML entity &zwj    ه‍ ه‍ ه‍ ه raw utf-8 ZWJ

Dynamically, using innerHTML