Novell GroupWise 8 Webaccess sometimes displays wrong characters when editing or replying to mails. For example if you edit an email and then use the addressbook and return international chars like åäö and such are replaced with ?.
To solve this problem you can try to change the default charset for unknown mails. It's set to HTMLMessage.Charset.default=ISO-8859-1 by default, while Charset.default=UTF8 is the default user charset.
The solution for me was to simply change HTMLMessage.Charset.default to match Charset.default. The file this is setup in is /var/opt/novell/groupwise/webaccess/webacc.cfg on Linux.