The same problem as wikEd has is now also present in the new editor of the usability initiative. See:
http://en.wikipedia.org/wiki/User_talk:Cacycle/wikEd#Insertion_of_.22unknown.22_character
and
https://bugs.webkit.org/show_bug.cgi?id=24025
Version: unspecified
Severity: normal
OS: Mac OS X 10.6