We are currently investigating an issue when using Outlook Express as the newsgroup client to post in these forums. Using Thunderbird or other NNTP clients are reported to work fine, but Outlook Express shows an error message when posting. If you ignore the error message, you will be able to post messages from OE. Please also note that posting message through a newsgroup software does not support accents and extended characters at this stage. Please use the Web interface for these languages.
Update: This appears to be a problem specific with Outlook Express.
Other NNTP clients such as Mozilla Thunderbird, Microsoft Windows Mail
(the replacement of Outlook Express in Vista) and Opera 9 don't seem to
show an error message.
Update 2: Here are some more information about supporting the accents in your NNTP clients: http://coreldraw.com/forums/t/440.aspx